diff --git a/niucloud/app/adminapi/controller/school_approval/Config.php b/niucloud/app/adminapi/controller/school_approval/Config.php
new file mode 100644
index 00000000..7cc04864
--- /dev/null
+++ b/niucloud/app/adminapi/controller/school_approval/Config.php
@@ -0,0 +1,192 @@
+<?php
+declare(strict_types=1);
+
+namespace app\adminapi\controller\school_approval;
+
+use app\adminapi\controller\BaseAdminApi;
+use app\service\school_approval\SchoolApprovalConfigService;
+use think\facade\Request;
+
+/**
+ * 审批流配置控制器
+ * Class Config
+ * @package app\adminapi\controller\school_approval
+ */
+class Config extends BaseAdminApi
+{
+    /**
+     * @var SchoolApprovalConfigService
+     */
+    protected $service;
+
+    public function initialize()
+    {
+        parent::initialize();
+        $this->service = new SchoolApprovalConfigService();
+    }
+
+    /**
+     * 获取审批流配置列表
+     */
+    public function lists()
+    {
+        $page = input('page', 1);
+        $limit = input('limit', 10);
+        $status = input('status', '');
+        
+        $where = [];
+        if ($status !== '') {
+            $where[] = ['status', '=', intval($status)];
+        }
+        
+        $config_name = input('config_name', '');
+        if (!empty($config_name)) {
+            $where[] = ['config_name', 'like', "%{$config_name}%"];
+        }
+        
+        $data = $this->service->getList($where, $page, $limit);
+        
+        return success($data);
+    }
+
+    /**
+     * 获取审批流配置详情
+     */
+    public function info()
+    {
+        $id = input('id', 0);
+        if (empty($id)) {
+            return error('参数错误');
+        }
+        
+        $info = $this->service->getInfo($id);
+        if (empty($info)) {
+            return error('审批流配置不存在');
+        }
+        
+        return success($info);
+    }
+
+    /**
+     * 添加审批流配置
+     */
+    public function add()
+    {
+        $data = Request::only(['config_name', 'description', 'status', 'nodes']);
+        
+        // 验证参数
+        if (empty($data['config_name'])) {
+            return error('配置名称不能为空');
+        }
+        
+        if (empty($data['nodes']) || !is_array($data['nodes'])) {
+            return error('至少需要添加一个审批节点');
+        }
+        
+        // 验证节点数据
+        foreach ($data['nodes'] as $node) {
+            if (empty($node['node_name'])) {
+                return error('节点名称不能为空');
+            }
+            
+            if (empty($node['approver_type'])) {
+                return error('审批人类型不能为空');
+            }
+            
+            if (empty($node['approver_ids'])) {
+                return error('审批人不能为空');
+            }
+        }
+        
+        // 设置创建人ID
+        $data['creator_id'] = $this->user_info['uid'];
+        
+        try {
+            $config_id = $this->service->add($data);
+            return success(['id' => $config_id]);
+        } catch (\Exception $e) {
+            return error($e->getMessage());
+        }
+    }
+
+    /**
+     * 编辑审批流配置
+     */
+    public function edit()
+    {
+        $data = Request::only(['id', 'config_name', 'description', 'status', 'nodes']);
+        
+        // 验证参数
+        if (empty($data['id'])) {
+            return error('参数错误');
+        }
+        
+        if (empty($data['config_name'])) {
+            return error('配置名称不能为空');
+        }
+        
+        if (empty($data['nodes']) || !is_array($data['nodes'])) {
+            return error('至少需要添加一个审批节点');
+        }
+        
+        // 验证节点数据
+        foreach ($data['nodes'] as $node) {
+            if (empty($node['node_name'])) {
+                return error('节点名称不能为空');
+            }
+            
+            if (empty($node['approver_type'])) {
+                return error('审批人类型不能为空');
+            }
+            
+            if (empty($node['approver_ids'])) {
+                return error('审批人不能为空');
+            }
+        }
+        
+        try {
+            $result = $this->service->edit($data);
+            return success($result);
+        } catch (\Exception $e) {
+            return error($e->getMessage());
+        }
+    }
+
+    /**
+     * 删除审批流配置
+     */
+    public function delete()
+    {
+        $id = input('id', 0);
+        if (empty($id)) {
+            return error('参数错误');
+        }
+        
+        try {
+            $result = $this->service->delete($id);
+            return success($result);
+        } catch (\Exception $e) {
+            return error($e->getMessage());
+        }
+    }
+
+    /**
+     * 修改状态
+     */
+    public function changeStatus()
+    {
+        $id = input('id', 0);
+        $status = input('status', 0);
+        
+        if (empty($id)) {
+            return error('参数错误');
+        }
+        
+        try {
+            $result = $this->service->changeStatus($id, $status);
+            return success($result);
+        } catch (\Exception $e) {
+            return error($e->getMessage());
+        }
+    }
+} 
\ No newline at end of file
diff --git a/niucloud/app/adminapi/controller/school_approval/Process.php b/niucloud/app/adminapi/controller/school_approval/Process.php
new file mode 100644
index 00000000..d4285f09
--- /dev/null
+++ b/niucloud/app/adminapi/controller/school_approval/Process.php
@@ -0,0 +1,154 @@
+<?php
+declare(strict_types=1);
+
+namespace app\adminapi\controller\school_approval;
+
+use app\adminapi\controller\BaseAdminApi;
+use app\service\school_approval\SchoolApprovalProcessService;
+use think\facade\Request;
+
+/**
+ * 审批流程控制器
+ * Class Process
+ * @package app\adminapi\controller\school_approval
+ */
+class Process extends BaseAdminApi
+{
+    /**
+     * @var SchoolApprovalProcessService
+     */
+    protected $service;
+
+    public function initialize()
+    {
+        parent::initialize();
+        $this->service = new SchoolApprovalProcessService();
+    }
+
+    /**
+     * 获取审批流程列表
+     */
+    public function lists()
+    {
+        $page = input('page', 1);
+        $limit = input('limit', 10);
+        $status = input('approval_status', '');
+        
+        $where = [];
+        if ($status !== '') {
+            $where[] = ['approval_status', '=', $status];
+        }
+        
+        $process_name = input('process_name', '');
+        if (!empty($process_name)) {
+            $where[] = ['process_name', 'like', "%{$process_name}%"];
+        }
+        
+        // 我发起的审批
+        $applicant_id = input('applicant_id', 0);
+        if (!empty($applicant_id)) {
+            $where[] = ['applicant_id', '=', $applicant_id];
+        }
+        
+        // 待我审批的
+        $approver_id = input('approver_id', 0);
+        if (!empty($approver_id)) {
+            $where[] = ['current_approver_id', '=', $approver_id];
+            $where[] = ['approval_status', '=', 'pending'];
+        }
+        
+        $data = $this->service->getList($where, $page, $limit);
+        
+        return success($data);
+    }
+
+    /**
+     * 获取审批流程详情
+     */
+    public function info()
+    {
+        $id = input('id', 0);
+        if (empty($id)) {
+            return error('参数错误');
+        }
+        
+        $info = $this->service->getInfo($id);
+        if (empty($info)) {
+            return error('审批流程不存在');
+        }
+        
+        return success($info);
+    }
+
+    /**
+     * 创建审批流程
+     */
+    public function create()
+    {
+        $data = Request::only(['process_name', 'remarks']);
+        $config_id = input('config_id', 0);
+        
+        // 验证参数
+        if (empty($data['process_name'])) {
+            return error('流程名称不能为空');
+        }
+        
+        if (empty($config_id)) {
+            return error('请选择审批流配置');
+        }
+        
+        // 设置申请人ID
+        $data['applicant_id'] = $this->user_info['uid'];
+        
+        try {
+            $process_id = $this->service->create($data, $config_id);
+            return success(['id' => $process_id]);
+        } catch (\Exception $e) {
+            return error($e->getMessage());
+        }
+    }
+
+    /**
+     * 审批
+     */
+    public function approve()
+    {
+        $process_id = input('process_id', 0);
+        $status = input('status', '');
+        $remarks = input('remarks', '');
+        
+        if (empty($process_id)) {
+            return error('参数错误');
+        }
+        
+        if (empty($status) || !in_array($status, ['approved', 'rejected'])) {
+            return error('请选择审批结果');
+        }
+        
+        try {
+            $result = $this->service->approve($process_id, $this->user_info['uid'], $status, $remarks);
+            return success($result);
+        } catch (\Exception $e) {
+            return error($e->getMessage());
+        }
+    }
+
+    /**
+     * 撤销审批流程
+     */
+    public function cancel()
+    {
+        $process_id = input('process_id', 0);
+        
+        if (empty($process_id)) {
+            return error('参数错误');
+        }
+        
+        try {
+            $result = $this->service->cancel($process_id, $this->user_info['uid']);
+            return success($result);
+        } catch (\Exception $e) {
+            return error($e->getMessage());
+        }
+    }
+} 
\ No newline at end of file
diff --git a/niucloud/app/adminapi/route/school_approval.php b/niucloud/app/adminapi/route/school_approval.php
new file mode 100644
index 00000000..b58d0de9
--- /dev/null
+++ b/niucloud/app/adminapi/route/school_approval.php
@@ -0,0 +1,48 @@
+<?php
+// +----------------------------------------------------------------------
+// | 审批流路由
+// +----------------------------------------------------------------------
+
+use think\facade\Route;
+
+// 审批流配置
+Route::group('school_approval/config', function () {
+    // 审批流配置列表
+    Route::get('lists', 'school_approval.Config/lists');
+    // 审批流配置详情
+    Route::get('info', 'school_approval.Config/info');
+    // 添加审批流配置
+    Route::post('add', 'school_approval.Config/add');
+    // 编辑审批流配置
+    Route::post('edit', 'school_approval.Config/edit');
+    // 删除审批流配置
+    Route::post('delete', 'school_approval.Config/delete');
+    // 修改状态
+    Route::post('changeStatus', 'school_approval.Config/changeStatus');
+})->middleware(
+    [
+        app\adminapi\middleware\AdminCheckToken::class,
+        app\adminapi\middleware\AdminCheckRole::class,
+        app\adminapi\middleware\AdminLog::class
+    ]
+);
+
+// 审批流程
+Route::group('school_approval/process', function () {
+    // 审批流程列表
+    Route::get('lists', 'school_approval.Process/lists');
+    // 审批流程详情
+    Route::get('info', 'school_approval.Process/info');
+    // 创建审批流程
+    Route::post('create', 'school_approval.Process/create');
+    // 审批
+    Route::post('approve', 'school_approval.Process/approve');
+    // 撤销审批流程
+    Route::post('cancel', 'school_approval.Process/cancel');
+})->middleware(
+    [
+        app\adminapi\middleware\AdminCheckToken::class,
+        app\adminapi\middleware\AdminCheckRole::class,
+        app\adminapi\middleware\AdminLog::class
+    ]
+); 
\ No newline at end of file
diff --git a/niucloud/app/model/school_approval/SchoolApprovalConfig.php b/niucloud/app/model/school_approval/SchoolApprovalConfig.php
new file mode 100644
index 00000000..2d5d4847
--- /dev/null
+++ b/niucloud/app/model/school_approval/SchoolApprovalConfig.php
@@ -0,0 +1,53 @@
+<?php
+declare(strict_types=1);
+
+namespace app\model\school_approval;
+
+use think\Model;
+
+/**
+ * 审批流配置模型
+ * Class SchoolApprovalConfig
+ * @package app\model\school_approval
+ */
+class SchoolApprovalConfig extends Model
+{
+    /**
+     * 数据表主键
+     * @var string
+     */
+    protected $pk = 'id';
+
+    /**
+     * 模型名称
+     * @var string
+     */
+    protected $name = 'school_approval_config';
+
+    /**
+     * 自动写入时间戳
+     * @var bool
+     */
+    protected $autoWriteTimestamp = true;
+
+    /**
+     * 创建时间字段
+     * @var string
+     */
+    protected $createTime = 'created_at';
+
+    /**
+     * 更新时间字段
+     * @var string
+     */
+    protected $updateTime = 'updated_at';
+
+    /**
+     * 关联审批流配置节点
+     * @return \think\model\relation\HasMany
+     */
+    public function nodes()
+    {
+        return $this->hasMany(SchoolApprovalConfigNode::class, 'config_id', 'id')->order('sequence', 'asc');
+    }
+} 
\ No newline at end of file
diff --git a/niucloud/app/model/school_approval/SchoolApprovalConfigNode.php b/niucloud/app/model/school_approval/SchoolApprovalConfigNode.php
new file mode 100644
index 00000000..e7292637
--- /dev/null
+++ b/niucloud/app/model/school_approval/SchoolApprovalConfigNode.php
@@ -0,0 +1,66 @@
+<?php
+declare(strict_types=1);
+
+namespace app\model\school_approval;
+
+use think\Model;
+
+/**
+ * 审批流配置节点模型
+ * Class SchoolApprovalConfigNode
+ * @package app\model\school_approval
+ */
+class SchoolApprovalConfigNode extends Model
+{
+    /**
+     * 数据表主键
+     * @var string
+     */
+    protected $pk = 'id';
+
+    /**
+     * 模型名称
+     * @var string
+     */
+    protected $name = 'school_approval_config_node';
+
+    /**
+     * 自动写入时间戳
+     * @var bool
+     */
+    protected $autoWriteTimestamp = true;
+
+    /**
+     * 创建时间字段
+     * @var string
+     */
+    protected $createTime = 'created_at';
+
+    /**
+     * 更新时间字段
+     * @var string
+     */
+    protected $updateTime = 'updated_at';
+
+    /**
+     * 审批人类型
+     */
+    const APPROVER_TYPE_USER = 'user';        // 指定用户
+    const APPROVER_TYPE_ROLE = 'role';        // 指定角色
+    const APPROVER_TYPE_DEPARTMENT = 'department'; // 指定部门
+
+    /**
+     * 签署类型
+     */
+    const SIGN_TYPE_OR = 'or_sign';  // 或签（一人通过即可）
+    const SIGN_TYPE_AND = 'and_sign'; // 会签（需全部通过）
+
+    /**
+     * 关联审批流配置
+     * @return \think\model\relation\BelongsTo
+     */
+    public function config()
+    {
+        return $this->belongsTo(SchoolApprovalConfig::class, 'config_id', 'id');
+    }
+} 
\ No newline at end of file
diff --git a/niucloud/app/model/school_approval/SchoolApprovalParticipants.php b/niucloud/app/model/school_approval/SchoolApprovalParticipants.php
new file mode 100644
index 00000000..6bd373b8
--- /dev/null
+++ b/niucloud/app/model/school_approval/SchoolApprovalParticipants.php
@@ -0,0 +1,66 @@
+<?php
+declare(strict_types=1);
+
+namespace app\model\school_approval;
+
+use think\Model;
+
+/**
+ * 审批参与人模型
+ * Class SchoolApprovalParticipants
+ * @package app\model\school_approval
+ */
+class SchoolApprovalParticipants extends Model
+{
+    /**
+     * 数据表主键
+     * @var string
+     */
+    protected $pk = 'id';
+
+    /**
+     * 模型名称
+     * @var string
+     */
+    protected $name = 'school_approval_participants';
+
+    /**
+     * 自动写入时间戳
+     * @var bool
+     */
+    protected $autoWriteTimestamp = true;
+
+    /**
+     * 创建时间字段
+     * @var string
+     */
+    protected $createTime = 'created_at';
+
+    /**
+     * 更新时间字段
+     * @var string
+     */
+    protected $updateTime = 'updated_at';
+
+    /**
+     * 审批状态
+     */
+    const STATUS_PENDING = 'pending';   // 待审批
+    const STATUS_APPROVED = 'approved'; // 已批准
+    const STATUS_REJECTED = 'rejected'; // 已拒绝
+
+    /**
+     * 签署类型
+     */
+    const SIGN_TYPE_OR = 'or_sign';  // 或签（一人通过即可）
+    const SIGN_TYPE_AND = 'and_sign'; // 会签（需全部通过）
+
+    /**
+     * 关联审批流程
+     * @return \think\model\relation\BelongsTo
+     */
+    public function process()
+    {
+        return $this->belongsTo(SchoolApprovalProcess::class, 'process_id', 'id');
+    }
+} 
\ No newline at end of file
diff --git a/niucloud/app/model/school_approval/SchoolApprovalProcess.php b/niucloud/app/model/school_approval/SchoolApprovalProcess.php
new file mode 100644
index 00000000..9786d6dd
--- /dev/null
+++ b/niucloud/app/model/school_approval/SchoolApprovalProcess.php
@@ -0,0 +1,60 @@
+<?php
+declare(strict_types=1);
+
+namespace app\model\school_approval;
+
+use think\Model;
+
+/**
+ * 审批流程模型
+ * Class SchoolApprovalProcess
+ * @package app\model\school_approval
+ */
+class SchoolApprovalProcess extends Model
+{
+    /**
+     * 数据表主键
+     * @var string
+     */
+    protected $pk = 'id';
+
+    /**
+     * 模型名称
+     * @var string
+     */
+    protected $name = 'school_approval_process';
+
+    /**
+     * 自动写入时间戳
+     * @var bool
+     */
+    protected $autoWriteTimestamp = true;
+
+    /**
+     * 创建时间字段
+     * @var string
+     */
+    protected $createTime = 'created_at';
+
+    /**
+     * 更新时间字段
+     * @var string
+     */
+    protected $updateTime = 'updated_at';
+
+    /**
+     * 审批状态
+     */
+    const STATUS_PENDING = 'pending';   // 待审批
+    const STATUS_APPROVED = 'approved'; // 已批准
+    const STATUS_REJECTED = 'rejected'; // 已拒绝
+
+    /**
+     * 关联审批参与人
+     * @return \think\model\relation\HasMany
+     */
+    public function participants()
+    {
+        return $this->hasMany(SchoolApprovalParticipants::class, 'process_id', 'id')->order('sequence', 'asc');
+    }
+} 
\ No newline at end of file
diff --git a/niucloud/app/model/school_approval_config.sql b/niucloud/app/model/school_approval_config.sql
new file mode 100644
index 00000000..423b1d28
--- /dev/null
+++ b/niucloud/app/model/school_approval_config.sql
@@ -0,0 +1,96 @@
+-- ========================
+-- 数据库结构增强脚本（MySQL）
+-- ========================
+
+-- 1. 会计期间有效性校验
+ALTER TABLE financial_accounting_periods
+    ADD COLUMN status ENUM('active', 'closed', 'locked') DEFAULT 'active' COMMENT '期间状态',
+ADD COLUMN validation_date DATE COMMENT '最后验证日期';
+
+-- 2. 预算表（支持多版本）
+CREATE TABLE financial_budgets (
+                                   budget_id INT AUTO_INCREMENT PRIMARY KEY COMMENT '预算ID',
+                                   company_id INT NOT NULL COMMENT '公司ID',
+                                   period_id INT NOT NULL COMMENT '会计期间ID',
+                                   account_id INT NOT NULL COMMENT '科目ID',
+                                   budget_version INT DEFAULT 1 COMMENT '版本号',
+                                   planned_amount DECIMAL(18,2) COMMENT '计划金额',
+                                   approved_date DATE COMMENT '审批日期',
+                                   FOREIGN KEY (company_id) REFERENCES financial_companies(company_id),
+                                   FOREIGN KEY (period_id) REFERENCES financial_accounting_periods(period_id),
+                                   FOREIGN KEY (account_id) REFERENCES financial_chart_of_accounts(account_id)
+) COMMENT='财务预算表';
+
+-- 3. 科目层级管理增强
+ALTER TABLE financial_chart_of_accounts
+    ADD COLUMN path VARCHAR(255) COMMENT '层级路径（如0/1001/）',
+ADD COLUMN level INT COMMENT '层级深度';
+
+-- 4. 数据血缘追踪表
+CREATE TABLE financial_data_trace (
+                                      trace_id BIGINT AUTO_INCREMENT PRIMARY KEY COMMENT '追踪记录ID',
+                                      source_table VARCHAR(50) NOT NULL COMMENT '源表名',
+                                      source_id BIGINT NOT NULL COMMENT '源记录ID',
+                                      target_table VARCHAR(50) NOT NULL COMMENT '目标表名',
+                                      target_id BIGINT NOT NULL COMMENT '目标记录ID',
+                                      operation_type ENUM('insert','update','delete') NOT NULL COMMENT '操作类型',
+                                      operator VARCHAR(50) COMMENT '操作人',
+                                      operation_time DATETIME DEFAULT CURRENT_TIMESTAMP COMMENT '操作时间'
+) COMMENT='数据操作追踪表';
+
+-- 5. 会计期间重叠检查触发器
+DELIMITER //
+CREATE TRIGGER trg_check_period_overlap
+    BEFORE INSERT ON financial_accounting_periods
+    FOR EACH ROW
+BEGIN
+    IF EXISTS (
+        SELECT 1 FROM financial_accounting_periods
+        WHERE company_id = NEW.company_id
+          AND period_id != NEW.period_id
+          AND (
+              (NEW.start_date BETWEEN start_date AND end_date)
+              OR (NEW.end_date BETWEEN start_date AND end_date)
+              OR (start_date BETWEEN NEW.start_date AND NEW.end_date)
+          )
+    ) THEN
+        SIGNAL SQLSTATE '45000'
+        SET MESSAGE_TEXT = '会计期间时间重叠';
+END IF;
+END//
+DELIMITER ;
+
+-- 6. 初始化会计期间状态
+UPDATE financial_accounting_periods
+SET status = CASE
+                 WHEN end_date >= CURDATE() THEN 'active'
+                 WHEN end_date < CURDATE() AND start_date > CURDATE() THEN 'locked'
+                 ELSE 'closed'
+    END;
+
+-- 7. 创建科目层级维护存储过程
+DELIMITER //
+CREATE PROCEDURE sp_refresh_account_hierarchy()
+BEGIN
+UPDATE financial_chart_of_accounts c
+    LEFT JOIN (
+    SELECT
+    a.account_id,
+    CONCAT(
+    IFNULL((SELECT CONCAT(path, parent_id, '/') FROM financial_chart_of_accounts
+    WHERE account_id = a.parent_id), '0/'),
+    a.account_id, '/'
+    ) AS new_path,
+    (LENGTH(IFNULL((SELECT path FROM financial_chart_of_accounts
+    WHERE account_id = a.parent_id), '0/')) - LENGTH(REPLACE(IFNULL(
+    (SELECT path FROM financial_chart_of_accounts
+    WHERE account_id = a.parent_id), '0/'), '/', ''))) + 1
+    AS new_level
+    FROM financial_chart_of_accounts a
+    ) AS sub ON c.account_id = sub.account_id
+    SET
+        c.path = sub.new_path,
+        c.level = sub.new_level
+WHERE c.is_active = TRUE;
+END//
+DELIMITER ;
\ No newline at end of file
diff --git a/niucloud/app/service/school_approval/SchoolApprovalConfigService.php b/niucloud/app/service/school_approval/SchoolApprovalConfigService.php
new file mode 100644
index 00000000..9a3cb1e9
--- /dev/null
+++ b/niucloud/app/service/school_approval/SchoolApprovalConfigService.php
@@ -0,0 +1,185 @@
+<?php
+declare(strict_types=1);
+
+namespace app\service\school_approval;
+
+use app\model\school_approval\SchoolApprovalConfig;
+use app\model\school_approval\SchoolApprovalConfigNode;
+use think\Exception;
+use think\facade\Db;
+
+/**
+ * 审批流配置服务
+ * Class SchoolApprovalConfigService
+ * @package app\service\school_approval
+ */
+class SchoolApprovalConfigService
+{
+    /**
+     * 获取审批流配置列表
+     * @param array $where
+     * @param int $page
+     * @param int $limit
+     * @return array
+     */
+    public function getList(array $where = [], int $page = 1, int $limit = 10): array
+    {
+        $field = 'id, config_name, description, status, creator_id, created_at, updated_at';
+        $order = 'id desc';
+        
+        $list = (new SchoolApprovalConfig())
+            ->where($where)
+            ->field($field)
+            ->order($order)
+            ->page($page, $limit)
+            ->select()
+            ->toArray();
+            
+        $count = (new SchoolApprovalConfig())->where($where)->count();
+        
+        return [
+            'list' => $list,
+            'count' => $count
+        ];
+    }
+    
+    /**
+     * 获取审批流配置详情
+     * @param int $id
+     * @return array
+     */
+    public function getInfo(int $id): array
+    {
+        $info = (new SchoolApprovalConfig())->with(['nodes'])->where(['id' => $id])->find();
+        if (empty($info)) {
+            return [];
+        }
+        
+        return $info->toArray();
+    }
+    
+    /**
+     * 添加审批流配置
+     * @param array $data
+     * @return int
+     * @throws \Exception
+     */
+    public function add(array $data): int
+    {
+        Db::startTrans();
+        try {
+            $config = [
+                'config_name' => $data['config_name'],
+                'description' => $data['description'] ?? '',
+                'status'      => $data['status'] ?? 1,
+                'creator_id'  => $data['creator_id']
+            ];
+            
+            $config_id = (new SchoolApprovalConfig())->insertGetId($config);
+            
+            // 添加节点
+            if (!empty($data['nodes'])) {
+                $nodes = [];
+                foreach ($data['nodes'] as $sequence => $node) {
+                    $nodes[] = [
+                        'config_id'     => $config_id,
+                        'node_name'     => $node['node_name'],
+                        'approver_type' => $node['approver_type'],
+                        'approver_ids'  => is_array($node['approver_ids']) ? implode(',', $node['approver_ids']) : $node['approver_ids'],
+                        'sign_type'     => $node['sign_type'] ?? SchoolApprovalConfigNode::SIGN_TYPE_OR,
+                        'sequence'      => $sequence + 1
+                    ];
+                }
+                
+                (new SchoolApprovalConfigNode())->insertAll($nodes);
+            }
+            
+            Db::commit();
+            return $config_id;
+        } catch (\Exception $e) {
+            Db::rollback();
+            throw new Exception($e->getMessage());
+        }
+    }
+    
+    /**
+     * 编辑审批流配置
+     * @param array $data
+     * @return bool
+     * @throws \Exception
+     */
+    public function edit(array $data): bool
+    {
+        Db::startTrans();
+        try {
+            $config = [
+                'config_name' => $data['config_name'],
+                'description' => $data['description'] ?? '',
+                'status'      => $data['status'] ?? 1
+            ];
+            
+            (new SchoolApprovalConfig())->where(['id' => $data['id']])->update($config);
+            
+            // 先删除原有节点
+            (new SchoolApprovalConfigNode())->where(['config_id' => $data['id']])->delete();
+            
+            // 添加新节点
+            if (!empty($data['nodes'])) {
+                $nodes = [];
+                foreach ($data['nodes'] as $sequence => $node) {
+                    $nodes[] = [
+                        'config_id'     => $data['id'],
+                        'node_name'     => $node['node_name'],
+                        'approver_type' => $node['approver_type'],
+                        'approver_ids'  => is_array($node['approver_ids']) ? implode(',', $node['approver_ids']) : $node['approver_ids'],
+                        'sign_type'     => $node['sign_type'] ?? SchoolApprovalConfigNode::SIGN_TYPE_OR,
+                        'sequence'      => $sequence + 1
+                    ];
+                }
+                
+                (new SchoolApprovalConfigNode())->insertAll($nodes);
+            }
+            
+            Db::commit();
+            return true;
+        } catch (\Exception $e) {
+            Db::rollback();
+            throw new Exception($e->getMessage());
+        }
+    }
+    
+    /**
+     * 删除审批流配置
+     * @param int $id
+     * @return bool
+     * @throws \Exception
+     */
+    public function delete(int $id): bool
+    {
+        Db::startTrans();
+        try {
+            // 删除配置
+            (new SchoolApprovalConfig())->where(['id' => $id])->delete();
+            
+            // 删除节点
+            (new SchoolApprovalConfigNode())->where(['config_id' => $id])->delete();
+            
+            Db::commit();
+            return true;
+        } catch (\Exception $e) {
+            Db::rollback();
+            throw new Exception($e->getMessage());
+        }
+    }
+    
+    /**
+     * 修改状态
+     * @param int $id
+     * @param int $status
+     * @return bool
+     */
+    public function changeStatus(int $id, int $status): bool
+    {
+        return (new SchoolApprovalConfig())->where(['id' => $id])->update(['status' => $status]) !== false;
+    }
+} 
\ No newline at end of file
diff --git a/niucloud/app/service/school_approval/SchoolApprovalProcessService.php b/niucloud/app/service/school_approval/SchoolApprovalProcessService.php
new file mode 100644
index 00000000..f92094f1
--- /dev/null
+++ b/niucloud/app/service/school_approval/SchoolApprovalProcessService.php
@@ -0,0 +1,289 @@
+<?php
+declare(strict_types=1);
+
+namespace app\service\school_approval;
+
+use app\model\school_approval\SchoolApprovalConfig;
+use app\model\school_approval\SchoolApprovalConfigNode;
+use app\model\school_approval\SchoolApprovalParticipants;
+use app\model\school_approval\SchoolApprovalProcess;
+use think\Exception;
+use think\facade\Db;
+
+/**
+ * 审批流程服务
+ * Class SchoolApprovalProcessService
+ * @package app\service\school_approval
+ */
+class SchoolApprovalProcessService
+{
+    /**
+     * 获取审批流程列表
+     * @param array $where
+     * @param int $page
+     * @param int $limit
+     * @return array
+     */
+    public function getList(array $where = [], int $page = 1, int $limit = 10): array
+    {
+        $field = 'id, process_name, applicant_id, application_time, current_approver_id, approval_status, approval_time, remarks, created_at, updated_at';
+        $order = 'id desc';
+        
+        $list = (new SchoolApprovalProcess())
+            ->where($where)
+            ->field($field)
+            ->order($order)
+            ->page($page, $limit)
+            ->select()
+            ->toArray();
+            
+        $count = (new SchoolApprovalProcess())->where($where)->count();
+        
+        return [
+            'list' => $list,
+            'count' => $count
+        ];
+    }
+    
+    /**
+     * 获取审批流程详情
+     * @param int $id
+     * @return array
+     */
+    public function getInfo(int $id): array
+    {
+        $info = (new SchoolApprovalProcess())->with(['participants'])->where(['id' => $id])->find();
+        if (empty($info)) {
+            return [];
+        }
+        
+        return $info->toArray();
+    }
+    
+    /**
+     * 创建审批流程
+     * @param array $data
+     * @param int $config_id 审批配置ID
+     * @return int
+     * @throws \Exception
+     */
+    public function create(array $data, int $config_id): int
+    {
+        Db::startTrans();
+        try {
+            // 获取审批配置详情
+            $config_info = (new SchoolApprovalConfigService())->getInfo($config_id);
+            if (empty($config_info)) {
+                throw new Exception('审批配置不存在');
+            }
+            
+            // 创建审批流程
+            $process = [
+                'process_name'        => $data['process_name'],
+                'applicant_id'        => $data['applicant_id'],
+                'application_time'    => time(),
+                'current_approver_id' => 0, // 初始时为0，后面会更新
+                'approval_status'     => SchoolApprovalProcess::STATUS_PENDING,
+                'remarks'             => $data['remarks'] ?? ''
+            ];
+            
+            $process_id = (new SchoolApprovalProcess())->insertGetId($process);
+            
+            // 创建审批参与人
+            $participants = [];
+            foreach ($config_info['nodes'] as $sequence => $node) {
+                $approver_ids = explode(',', $node['approver_ids']);
+                foreach ($approver_ids as $approver_id) {
+                    $participants[] = [
+                        'process_id'     => $process_id,
+                        'participant_id' => $approver_id,
+                        'sequence'       => $node['sequence'],
+                        'status'         => SchoolApprovalParticipants::STATUS_PENDING,
+                        'sign_type'      => $node['sign_type']
+                    ];
+                }
+            }
+            
+            if (!empty($participants)) {
+                (new SchoolApprovalParticipants())->insertAll($participants);
+                
+                // 更新当前审批人为第一个审批人
+                $first_participant = (new SchoolApprovalParticipants())
+                    ->where(['process_id' => $process_id])
+                    ->order('sequence', 'asc')
+                    ->find();
+                    
+                if (!empty($first_participant)) {
+                    (new SchoolApprovalProcess())->where(['id' => $process_id])
+                        ->update(['current_approver_id' => $first_participant['participant_id']]);
+                }
+            }
+            
+            Db::commit();
+            return $process_id;
+        } catch (\Exception $e) {
+            Db::rollback();
+            throw new Exception($e->getMessage());
+        }
+    }
+    
+    /**
+     * 审批
+     * @param int $process_id 流程ID
+     * @param int $approver_id 审批人ID
+     * @param string $status 审批状态
+     * @param string $remarks 备注
+     * @return bool
+     * @throws \Exception
+     */
+    public function approve(int $process_id, int $approver_id, string $status, string $remarks = ''): bool
+    {
+        Db::startTrans();
+        try {
+            // 获取审批流程
+            $process_info = (new SchoolApprovalProcess())->where(['id' => $process_id])->find();
+            if (empty($process_info)) {
+                throw new Exception('审批流程不存在');
+            }
+            
+            // 检查是否当前审批人
+            if ($process_info['current_approver_id'] != $approver_id) {
+                throw new Exception('您不是当前审批人');
+            }
+            
+            // 检查流程状态
+            if ($process_info['approval_status'] != SchoolApprovalProcess::STATUS_PENDING) {
+                throw new Exception('该审批流程已完成');
+            }
+            
+            // 获取当前审批节点
+            $current_participant = (new SchoolApprovalParticipants())
+                ->where([
+                    'process_id' => $process_id,
+                    'participant_id' => $approver_id,
+                    'status' => SchoolApprovalParticipants::STATUS_PENDING
+                ])
+                ->find();
+                
+            if (empty($current_participant)) {
+                throw new Exception('审批节点信息错误');
+            }
+            
+            // 更新当前审批人状态
+            (new SchoolApprovalParticipants())->where(['id' => $current_participant['id']])
+                ->update([
+                    'status' => $status,
+                    'remarks' => $remarks
+                ]);
+                
+            // 如果拒绝，直接更新整个流程状态为拒绝
+            if ($status == SchoolApprovalParticipants::STATUS_REJECTED) {
+                (new SchoolApprovalProcess())->where(['id' => $process_id])
+                    ->update([
+                        'approval_status' => SchoolApprovalProcess::STATUS_REJECTED,
+                        'approval_time' => time(),
+                        'remarks' => $remarks
+                    ]);
+                
+                Db::commit();
+                return true;
+            }
+            
+            // 检查当前节点是否需要会签
+            $same_sequence_participants = (new SchoolApprovalParticipants())
+                ->where([
+                    'process_id' => $process_id,
+                    'sequence' => $current_participant['sequence'],
+                    'status' => SchoolApprovalParticipants::STATUS_PENDING
+                ])
+                ->select();
+                
+            // 如果是会签且还有其他人未审批，则等待
+            if ($current_participant['sign_type'] == SchoolApprovalParticipants::SIGN_TYPE_AND && !$same_sequence_participants->isEmpty()) {
+                // 不做任何处理，等待其他人审批
+                Db::commit();
+                return true;
+            }
+            
+            // 获取下一个审批节点
+            $next_participant = (new SchoolApprovalParticipants())
+                ->where([
+                    'process_id' => $process_id,
+                    'status' => SchoolApprovalParticipants::STATUS_PENDING
+                ])
+                ->order('sequence', 'asc')
+                ->find();
+                
+            if (empty($next_participant)) {
+                // 没有下一个审批人，流程结束，标记为已通过
+                (new SchoolApprovalProcess())->where(['id' => $process_id])
+                    ->update([
+                        'approval_status' => SchoolApprovalProcess::STATUS_APPROVED,
+                        'approval_time' => time()
+                    ]);
+            } else {
+                // 更新当前审批人为下一个审批人
+                (new SchoolApprovalProcess())->where(['id' => $process_id])
+                    ->update(['current_approver_id' => $next_participant['participant_id']]);
+            }
+            
+            Db::commit();
+            return true;
+        } catch (\Exception $e) {
+            Db::rollback();
+            throw new Exception($e->getMessage());
+        }
+    }
+    
+    /**
+     * 撤销审批流程
+     * @param int $process_id 流程ID
+     * @param int $applicant_id 申请人ID
+     * @return bool
+     * @throws \Exception
+     */
+    public function cancel(int $process_id, int $applicant_id): bool
+    {
+        Db::startTrans();
+        try {
+            // 获取审批流程
+            $process_info = (new SchoolApprovalProcess())->where(['id' => $process_id])->find();
+            if (empty($process_info)) {
+                throw new Exception('审批流程不存在');
+            }
+            
+            // 检查是否申请人
+            if ($process_info['applicant_id'] != $applicant_id) {
+                throw new Exception('您不是该流程的申请人');
+            }
+            
+            // 检查流程状态
+            if ($process_info['approval_status'] != SchoolApprovalProcess::STATUS_PENDING) {
+                throw new Exception('该审批流程已完成，无法撤销');
+            }
+            
+            // 更新流程状态为已拒绝（撤销）
+            (new SchoolApprovalProcess())->where(['id' => $process_id])
+                ->update([
+                    'approval_status' => SchoolApprovalProcess::STATUS_REJECTED,
+                    'approval_time' => time(),
+                    'remarks' => '申请人撤销'
+                ]);
+                
+            // 更新所有待审批节点为已拒绝
+            (new SchoolApprovalParticipants())->where([
+                'process_id' => $process_id,
+                'status' => SchoolApprovalParticipants::STATUS_PENDING
+            ])->update([
+                'status' => SchoolApprovalParticipants::STATUS_REJECTED,
+                'remarks' => '申请人撤销'
+            ]);
+            
+            Db::commit();
+            return true;
+        } catch (\Exception $e) {
+            Db::rollback();
+            throw new Exception($e->getMessage());
+        }
+    }
+} 
\ No newline at end of file