diff --git a/admin/dashboard/blueprints/message_push.py b/admin/dashboard/blueprints/message_push.py
index 3673c19..21e861e 100644
--- a/admin/dashboard/blueprints/message_push.py
+++ b/admin/dashboard/blueprints/message_push.py
@@ -101,7 +101,10 @@ def api_tasks_list():
         # 处理recurring_time序列化问题
         for task in tasks:
             if hasattr(task, 'recurring_time') and task.recurring_time:
-                task.recurring_time = task.recurring_time.isoformat()
+                # 将timedelta转换为HH:mm格式的字符串
+                hours = task.recurring_time.seconds // 3600
+                minutes = (task.recurring_time.seconds % 3600) // 60
+                task.recurring_time = f"{hours:02d}:{minutes:02d}"
 
         return jsonify({
             "success": True,