diff --git a/Plugins/Drivers/Mock.TcpClient/DeviceTcpClient.cs b/Plugins/Drivers/Mock.TcpClient/DeviceTcpClient.cs
index 5132f09..b0e0dbf 100644
--- a/Plugins/Drivers/Mock.TcpClient/DeviceTcpClient.cs
+++ b/Plugins/Drivers/Mock.TcpClient/DeviceTcpClient.cs
@@ -58,7 +58,7 @@ namespace Mock.TcpClient
             get
             {
                 //客户端对象不为空并且客户端已连接则返回true
-                return _client != null && _client.TcpClient.Connected;
+                return _client != null && _client.TcpClient != null && _client.TcpClient.Connected;
             }
         }