diff --git a/backend/services/leaderboard-service/src/api/guards/admin.guard.ts b/backend/services/leaderboard-service/src/api/guards/admin.guard.ts
index 9ed85ed0..b5c030cd 100644
--- a/backend/services/leaderboard-service/src/api/guards/admin.guard.ts
+++ b/backend/services/leaderboard-service/src/api/guards/admin.guard.ts
@@ -11,7 +11,9 @@ export class AdminGuard implements CanActivate {
     }
 
     // 检查用户是否具有管理员角色
-    const isAdmin = user.role === 'ADMIN' || user.role === 'SUPER_ADMIN';
+    // 支持大小写: admin/ADMIN, super_admin/SUPER_ADMIN
+    const role = user.role?.toLowerCase();
+    const isAdmin = role === 'admin' || role === 'super_admin';
 
     if (!isAdmin) {
       throw new ForbiddenException('需要管理员权限');