diff --git a/PowerThreadPool/Core/PowerThreadPool.cs b/PowerThreadPool/Core/PowerThreadPool.cs
index c3f1c8cd..c79d3041 100644
--- a/PowerThreadPool/Core/PowerThreadPool.cs
+++ b/PowerThreadPool/Core/PowerThreadPool.cs
@@ -839,7 +839,11 @@ private void IdleSetting()
         /// <param name="work"></param>
         internal void SetWorkOwner(WorkBase work)
         {
-            _aliveWorkDic[work.ID] = work;
+            if (!work.IsAlive)
+            {
+                work.IsAlive = true;
+                _aliveWorkDic[work.ID] = work;
+            }
         }
 
         /// <summary>
diff --git a/PowerThreadPool/Works/Work.cs b/PowerThreadPool/Works/Work.cs
index 2bf97d00..fa7edbf2 100644
--- a/PowerThreadPool/Works/Work.cs
+++ b/PowerThreadPool/Works/Work.cs
@@ -445,6 +445,7 @@ internal override bool ShouldRequeue(ExecuteResultBase executeResult)
 
         public override void Dispose()
         {
+            IsAlive = false;
             if (PauseSignal != null)
             {
                 PauseSignal.Dispose();
diff --git a/PowerThreadPool/Works/WorkBase.cs b/PowerThreadPool/Works/WorkBase.cs
index c01e29d4..d75e5d44 100644
--- a/PowerThreadPool/Works/WorkBase.cs
+++ b/PowerThreadPool/Works/WorkBase.cs
@@ -17,6 +17,7 @@ internal abstract class WorkBase : WorkItemBase, IDisposable
         internal PowerPool PowerPool { get; set; }
         internal AsyncWorkInfo AsyncWorkInfo { get; set; }
         internal CancellationTokenSource CancellationTokenSource { get; set; }
+        internal bool IsAlive { get; set; } = false;
         internal volatile int _executeCount;
         internal int ExecuteCount
         {