diff --git a/Falcon.SugarApi/TimedTask/TimedTask.cs b/Falcon.SugarApi/TimedTask/TimedTask.cs
index f4109f7..f29b858 100644
--- a/Falcon.SugarApi/TimedTask/TimedTask.cs
+++ b/Falcon.SugarApi/TimedTask/TimedTask.cs
@@ -32,17 +32,17 @@ namespace Falcon.SugarApi.TimedTask
         /// <summary>
         /// 执行计划的Cron串
         /// </summary>
-        public abstract string CronSchedule { get; }
+        protected abstract string CronSchedule { get; }
 
         /// <summary>
-        /// Timer心跳
+        /// Timer心跳 毫秒
         /// </summary>
-        public virtual int Heartbeat { get; protected set; } = 1;
+        public virtual int Heartbeat { get; protected set; } = 1000;
 
         /// <summary>
         /// 获取下次执行任务的计划
         /// </summary>
-        public CronExpression Schedule { get; private set; }
+        protected CronExpression Schedule { get; private set; }
 
         /// <summary>
         /// 任务正在运行
@@ -95,7 +95,7 @@ namespace Falcon.SugarApi.TimedTask
         public TimedTask(IServiceProvider service) {
             this.Service = service;
             this.Logger = service.GetService(typeof(ILogger<>).MakeGenericType(GetType())) as ILogger;
-            _timer = new PeriodicTimer(TimeSpan.FromSeconds(this.Heartbeat));
+            _timer = new PeriodicTimer(TimeSpan.FromMilliseconds(this.Heartbeat));
             this.Schedule = new CronExpression(this.CronSchedule);
         }
 
@@ -113,7 +113,10 @@ namespace Falcon.SugarApi.TimedTask
                     if(stoppingToken.IsCancellationRequested) {
                         break;
                     }
-                    if(this._isRunning || DateTime.Now < this.NextTickTime) {
+                    if(this._isRunning) {
+                        continue;
+                    }
+                    if(DateTime.Now < this.NextTickTime) {
                         continue;
                     }
                     this._isRunning = true;