diff --git a/Assets/Script/Gameplay/Connect/ConnectionLineManager.cs b/Assets/Script/Gameplay/Connect/ConnectionLineManager.cs
index cf49f7d..464ecd7 100644
--- a/Assets/Script/Gameplay/Connect/ConnectionLineManager.cs
+++ b/Assets/Script/Gameplay/Connect/ConnectionLineManager.cs
@@ -26,6 +26,16 @@ namespace Script.Gameplay.Connect
 
         public ConnectionLine GenerateConnectionLine(IConnectable a, IConnectable b)
         {
+            // 先检测 a b 点是否已经存在连接线
+            foreach (var aline in a.ConnectionLines)
+            {
+                if (aline.PointA.GetGameObject() == b.GetGameObject() || aline.PointB.GetGameObject() == b.GetGameObject())
+                {
+                    Debug.Log("ab点间已经存在连接线");
+                    return null;
+                }
+            }
+            
             GameObject lineObject = Instantiate(linePrefab, this.transform);
             ConnectionLine connectionLine = lineObject.GetComponent<ConnectionLine>();
             if (connectionLine != null)
diff --git a/Assets/Script/Gameplay/Player/PlayerConnectController.cs b/Assets/Script/Gameplay/Player/PlayerConnectController.cs
index ddc1602..33e5e67 100644
--- a/Assets/Script/Gameplay/Player/PlayerConnectController.cs
+++ b/Assets/Script/Gameplay/Player/PlayerConnectController.cs
@@ -157,7 +157,7 @@ namespace Script.Gameplay.Player
                     return;
                 }
                 // 创建连接线
-                ConnectionLine connectionLine = ConnectionLineManager.Instance.GenerateConnectionLine(outTarget, inputTarget);
+                ConnectionLineManager.Instance.GenerateConnectionLine(outTarget, inputTarget);
   
                 // 重置信号目标
                 outTarget = null;