diff --git a/backend/models/admin_role.py b/backend/models/admin_role.py
index 723ac3a..13a09b6 100644
--- a/backend/models/admin_role.py
+++ b/backend/models/admin_role.py
@@ -14,7 +14,7 @@ from utils.database import execute_one, execute_query, execute_insert, execute_u
 
 
 class AdminRoleModel:
-    """管理员角色数据模型（无班级ID）"""
+    """管理员角色数据模型"""
     
     @staticmethod
     async def get_by_user_id(user_id: int) -> Optional[Dict[str, Any]]:
diff --git a/frontend/api/clear_session.php b/frontend/api/clear_session.php
new file mode 100644
index 0000000..48a2bea
--- /dev/null
+++ b/frontend/api/clear_session.php
@@ -0,0 +1,63 @@
+<?php
+/**
+ * 班级操行分管理系统 - Session 退出清除接口
+ * 
+ * 开发者: Canglan
+ * 联系方式: admin@sea-studio.top
+ * 版权归属: Sea Network Technology Studio
+ * 许可证: MIT License
+ * 
+ * 版权所有 © Sea Network Technology Studio
+ * 
+ * 说明：退出登录时，清除 PHP Session
+ */
+
+// 引入配置文件以初始化 Session
+require_once __DIR__ . '/../config.php';
+
+// 设置响应头
+header('Content-Type: application/json; charset=utf-8');
+
+// 允许跨域
+header('Access-Control-Allow-Origin: *');
+header('Access-Control-Allow-Methods: POST, OPTIONS');
+header('Access-Control-Allow-Headers: Content-Type');
+
+// 处理预检请求
+if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
+    http_response_code(200);
+    exit();
+}
+
+// 只允许 POST 请求
+if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
+    http_response_code(405);
+    echo json_encode([
+        'success' => false,
+        'message' => '仅支持 POST 请求'
+    ]);
+    exit();
+}
+
+// 清除 Session
+$_SESSION = array();
+
+// 如果使用了 cookie，删除 cookie
+if (ini_get("session.use_cookies")) {
+    $params = session_get_cookie_params();
+    setcookie(session_name(), '', time() - 42000,
+        $params["path"], $params["domain"],
+        $params["secure"], $params["httponly"]
+    );
+}
+
+// 销毁 Session
+session_destroy();
+
+// 返回成功响应
+http_response_code(200);
+echo json_encode([
+    'success' => true,
+    'message' => 'Session 已清除'
+]);
+exit();
\ No newline at end of file
diff --git a/frontend/api/save_session.php b/frontend/api/save_session.php
index f6a704e..49fcfe3 100644
--- a/frontend/api/save_session.php
+++ b/frontend/api/save_session.php
@@ -98,7 +98,7 @@ $_SESSION['user_id'] = $data['user_id'];
 $_SESSION['user_type'] = $data['user_type'];
 $_SESSION['username'] = $data['username'];
 $_SESSION['real_name'] = $data['real_name'] ?? '';
-$_SESSION['role'] = $data['role'] ?? '';  // 添加 role 字段
+$_SESSION['role'] = $data['role'] ?? '';
 $_SESSION['login_time'] = time();
 
 // 如果是学生，额外设置 student_id（与 user_id 相同）
diff --git a/frontend/assets/js/common.js b/frontend/assets/js/common.js
index fb4f284..8483add 100644
--- a/frontend/assets/js/common.js
+++ b/frontend/assets/js/common.js
@@ -145,8 +145,27 @@ function getStatusBadge(status, type = 'homework') {
 }
 
 async function logout() {
-    await apiPost('/api/auth/logout');
+    // 清除 PHP Session
+    try {
+        await fetch('/api/clear_session.php', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' }
+        });
+    } catch (e) {
+        console.warn('清除Session失败', e);
+    }
+    
+    // 清除后端 Token
+    try {
+        await apiPost('/api/auth/logout');
+    } catch (e) {
+        console.warn('后端登出失败', e);
+    }
+    
+    // 清除 localStorage
     clearAuth();
+    
+    // 跳转回登录页
     window.location.href = '/index.php';
 }