diff --git a/Assets/TEngine/Runtime/UI/UIManager.cs b/Assets/TEngine/Runtime/UI/UIManager.cs
index 6ccdd852..c29dc6bb 100644
--- a/Assets/TEngine/Runtime/UI/UIManager.cs
+++ b/Assets/TEngine/Runtime/UI/UIManager.cs
@@ -130,6 +130,7 @@ namespace UI
                     m_tmpWindowList.Add(kv.Value);
                 }
                 m_tmpWindowListDirty = false;
+                itr.Dispose();
             }
             return m_tmpWindowList;
         }