diff --git a/DungeonShooting_Godot/src/framework/activity/ActivityObject.cs b/DungeonShooting_Godot/src/framework/activity/ActivityObject.cs
index dbbdacb..7055f90 100644
--- a/DungeonShooting_Godot/src/framework/activity/ActivityObject.cs
+++ b/DungeonShooting_Godot/src/framework/activity/ActivityObject.cs
@@ -320,6 +320,14 @@
     protected virtual void DebugDraw()
     {
     }
+
+    /// <summary>
+    /// 返回当物体 CollisionLayer 是否能与 layer 层碰撞
+    /// </summary>
+    public bool CollisionWithLayer(uint layer)
+    {
+        return (CollisionLayer & layer) != 0;
+    }
     
     /// <summary>
     /// 拾起一个 node 节点, 也就是将其从场景树中移除
diff --git a/DungeonShooting_Godot/src/game/room/RoomManager.cs b/DungeonShooting_Godot/src/game/room/RoomManager.cs
index 31a93fc..de2e545 100644
--- a/DungeonShooting_Godot/src/game/room/RoomManager.cs
+++ b/DungeonShooting_Godot/src/game/room/RoomManager.cs
@@ -99,7 +99,7 @@
         {
             var inst = (ActivityObject)o;
             var count = Player.Affiliation.FindIncludeItemsCount(
-                activityObject => activityObject.CollisionLayer == PhysicsLayer.Enemy && activityObject != inst
+                activityObject => activityObject != inst && activityObject.CollisionWithLayer(PhysicsLayer.Enemy)
             );
             GD.Print("有敌人死亡! 当前房间还剩: " + count + "个敌人");
             if (count == 0)