diff --git a/lib/src/main/java/com/blanke/xsocket/tcp/client/XTcpClient.java b/lib/src/main/java/com/blanke/xsocket/tcp/client/XTcpClient.java
index e5f0506..b4cc74d 100644
--- a/lib/src/main/java/com/blanke/xsocket/tcp/client/XTcpClient.java
+++ b/lib/src/main/java/com/blanke/xsocket/tcp/client/XTcpClient.java
@@ -70,7 +70,7 @@ public static XTcpClient getTcpClient(Socket socket, TargetInfo targetInfo) {
     }
 
     public static XTcpClient getTcpClient(Socket socket, TargetInfo targetInfo, TcpConnConfig connConfig) {
-        if (!socket.isConnected()) {
+        if (!socket.isClosed()) {
             ExceptionUtils.throwException("socket is closeed");
         }
         XTcpClient xTcpClient = new XTcpClient();