diff --git a/Falcon.SugarApi/TimedBackgroundTask/TimedTask.cs b/Falcon.SugarApi/TimedBackgroundTask/TimedTask.cs
index 8000939..285aaaf 100644
--- a/Falcon.SugarApi/TimedBackgroundTask/TimedTask.cs
+++ b/Falcon.SugarApi/TimedBackgroundTask/TimedTask.cs
@@ -54,17 +54,21 @@ namespace Falcon.SugarApi.TimedBackgroundTask
         public DateTime NextTickTime { get; set; } = DateTime.MinValue;
 
         /// <summary>
-        /// 后台任务开始
+        /// 后台任务开始。返回True任务会继续执行，False则任务退出。
         /// </summary>
-        protected virtual void OnStart(TimedTask t,CancellationToken stoppingToken) { }
+        protected virtual bool OnStart(TimedTask t,CancellationToken stoppingToken) {
+            return true;
+        }
         /// <summary>
         /// 后台任务停止
         /// </summary>
         protected virtual void OnStop(TimedTask t,CancellationToken stoppingToken) { }
         /// <summary>
-        /// 完成一次执行
+        /// 完成一次执行。返回True任务会继续执行，False则任务退出。
         /// </summary>
-        protected virtual void OnCompleted(TimedTask t,CancellationToken stoppingToken) { }
+        protected virtual bool OnCompleted(TimedTask t,CancellationToken stoppingToken) {
+            return true;
+        }
         /// <summary>
         /// 执行中发生未处理异常。返回True任务会继续执行，False则任务退出。
         /// </summary>
@@ -101,7 +105,9 @@ namespace Falcon.SugarApi.TimedBackgroundTask
         /// <param name="stoppingToken">退出信号</param>
         /// <returns>无返回</returns>
         protected override async Task ExecuteAsync(CancellationToken stoppingToken) {
-            this.OnStart(this,stoppingToken);
+            if(!this.OnStart(this,stoppingToken)) {
+                return;
+            }
             while(await _timer.WaitForNextTickAsync(stoppingToken)) {
                 lock(_lock) {
                     if(stoppingToken.IsCancellationRequested) {
@@ -114,8 +120,8 @@ namespace Falcon.SugarApi.TimedBackgroundTask
                 }
                 try {
                     var goOn = await this.Run(stoppingToken);
-                    this.OnCompleted(this,stoppingToken);
-                    if(!goOn) {
+                    var comResult = this.OnCompleted(this,stoppingToken);
+                    if(!goOn || !comResult) {
                         break;
                     }
                 }