diff --git a/Assets/Scripts/Item/Point3DItem.cs b/Assets/Scripts/Item/Point3DItem.cs
index 0f67e035..d8ca8442 100644
--- a/Assets/Scripts/Item/Point3DItem.cs
+++ b/Assets/Scripts/Item/Point3DItem.cs
@@ -4,6 +4,7 @@ using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using XMLTool;
+using static OperationController;
 
 public class Point3DItem : MonoBehaviour
 {
@@ -37,11 +38,18 @@ public class Point3DItem : MonoBehaviour
         rotSpeed = data.rotateSpeed;
         gameObject.GetComponent<SpriteRenderer>().sortingOrder = data.order;
         TypeEventSystem.Global.Register<OnPoint3DQuestionDestroy>(OnObjDestroy).UnRegisterWhenGameObjectDestroyed(gameObject);
+        TypeEventSystem.Global.Register<StepStatusOnChange>(OnStepChanged);
 
     }
 
+    private void OnStepChanged(StepStatusOnChange change)
+    {
+        OnObjDestroy(default);
+    }
+
     private void OnObjDestroy(OnPoint3DQuestionDestroy destroy)
     {
+        TypeEventSystem.Global.UnRegister<StepStatusOnChange>(OnStepChanged);
         GameObject.Destroy(gameObject);
     }