diff --git a/network/ws_conn.go b/network/ws_conn.go
index a45c5c6..2243c84 100644
--- a/network/ws_conn.go
+++ b/network/ws_conn.go
@@ -15,16 +15,16 @@ type WSConn struct {
 	sync.Mutex
 	conn      *websocket.Conn
 	writeChan chan []byte
-	maxMsgLen uint32
+	maxWriteMsgLen uint32
 	closeFlag bool
 	header    http.Header
 }
 
-func newWSConn(conn *websocket.Conn, header http.Header, pendingWriteNum int, maxMsgLen uint32, messageType int) *WSConn {
+func newWSConn(conn *websocket.Conn, header http.Header, pendingWriteNum int, maxWriteMsgLen uint32, messageType int) *WSConn {
 	wsConn := new(WSConn)
 	wsConn.conn = conn
 	wsConn.writeChan = make(chan []byte, pendingWriteNum)
-	wsConn.maxMsgLen = maxMsgLen
+	wsConn.maxWriteMsgLen = maxWriteMsgLen
 	wsConn.header = header
 
 	go func() {
@@ -118,7 +118,7 @@ func (wsConn *WSConn) WriteMsg(args ...[]byte) error {
 	}
 
 	// check len
-	if msgLen > wsConn.maxMsgLen {
+	if  wsConn.maxWriteMsgLen > 0 && msgLen > wsConn.maxWriteMsgLen {
 		return errors.New("message too long")
 	} else if msgLen < 1 {
 		return errors.New("message too short")
diff --git a/network/ws_server.go b/network/ws_server.go
index 8623faf..903ea2a 100644
--- a/network/ws_server.go
+++ b/network/ws_server.go
@@ -16,7 +16,8 @@ type WSServer struct {
 	Addr            string
 	MaxConnNum      int
 	PendingWriteNum int
-	MaxMsgLen       uint32
+	MaxReadMsgLen       uint32
+	MaxWriteMsgLen      uint32
 	CertFile        string
 	KeyFile         string
 	NewAgent        func(*WSConn) Agent
@@ -32,7 +33,8 @@ type WSServer struct {
 type WSHandler struct {
 	maxConnNum      int
 	pendingWriteNum int
-	maxMsgLen       uint32
+	maxReadMsgLen   uint32
+	maxWriteMsgLen  uint32
 	newAgent        func(*WSConn) Agent
 	upgrader        websocket.Upgrader
 	conns           WebsocketConnSet
@@ -55,7 +57,7 @@ func (handler *WSHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		log.Error("upgrade fail", log.String("error", err.Error()))
 		return
 	}
-	conn.SetReadLimit(int64(handler.maxMsgLen))
+	conn.SetReadLimit(int64(handler.maxReadMsgLen))
 	if handler.messageType == 0 {
 		handler.messageType = websocket.TextMessage
 	}
@@ -93,7 +95,7 @@ func (handler *WSHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 
 	c.SetLinger(0)
 	c.SetNoDelay(true)
-	wsConn := newWSConn(conn, r.Header, handler.pendingWriteNum, handler.maxMsgLen, handler.messageType)
+	wsConn := newWSConn(conn, r.Header, handler.pendingWriteNum, handler.maxWriteMsgLen, handler.messageType)
 	agent := handler.newAgent(wsConn)
 	agent.Run()
 
@@ -118,7 +120,6 @@ func (server *WSServer) Start() error {
 		log.Error("WSServer Listen fail", log.String("error", err.Error()))
 		return err
 	}
-
 	if server.MaxConnNum <= 0 {
 		server.MaxConnNum = 100
 		log.Info("invalid MaxConnNum", log.Int("reset", server.MaxConnNum))
@@ -127,9 +128,9 @@ func (server *WSServer) Start() error {
 		server.PendingWriteNum = 100
 		log.Info("invalid PendingWriteNum", log.Int("reset", server.PendingWriteNum))
 	}
-	if server.MaxMsgLen <= 0 {
-		server.MaxMsgLen = 4096
-		log.Info("invalid MaxMsgLen", log.Uint32("reset", server.MaxMsgLen))
+	if server.MaxReadMsgLen <= 0 {
+		server.MaxReadMsgLen = 4096
+		log.Info("invalid MaxReadMsgLen", log.Uint32("reset", server.MaxReadMsgLen))
 	}
 	if server.HandshakeTimeout <= 0 {
 		server.HandshakeTimeout = 15 * time.Second
@@ -167,7 +168,8 @@ func (server *WSServer) Start() error {
 	server.handler = &WSHandler{
 		maxConnNum:      server.MaxConnNum,
 		pendingWriteNum: server.PendingWriteNum,
-		maxMsgLen:       server.MaxMsgLen,
+		maxReadMsgLen:   server.MaxReadMsgLen,
+		maxWriteMsgLen:  server.MaxWriteMsgLen,
 		newAgent:        server.NewAgent,
 		conns:           make(WebsocketConnSet),
 		messageType:     server.messageType,
diff --git a/sysmodule/netmodule/wsmodule/WSModule.go b/sysmodule/netmodule/wsmodule/WSModule.go
index ba2dd43..7cef44b 100644
--- a/sysmodule/netmodule/wsmodule/WSModule.go
+++ b/sysmodule/netmodule/wsmodule/WSModule.go
@@ -34,7 +34,8 @@ type WSCfg struct {
 	ListenAddr      string
 	MaxConnNum      int
 	PendingWriteNum int
-	MaxMsgLen       uint32
+	MaxReadMsgLen       uint32
+	MaxWriteMsgLen      uint32
 	LittleEndian    bool //是否小端序
 	KeyFile 		string
 	CertFile 		string
@@ -67,7 +68,8 @@ func (ws *WSModule) OnInit() error {
 
 	ws.WSServer.MaxConnNum = ws.wsCfg.MaxConnNum
 	ws.WSServer.PendingWriteNum = ws.wsCfg.PendingWriteNum
-	ws.WSServer.MaxMsgLen = ws.wsCfg.MaxMsgLen
+	ws.WSServer.MaxReadMsgLen = ws.wsCfg.MaxReadMsgLen
+	ws.WSServer.MaxWriteMsgLen = ws.wsCfg.MaxWriteMsgLen
 	ws.WSServer.Addr = ws.wsCfg.ListenAddr
 	ws.WSServer.HandshakeTimeout = ws.wsCfg.HandshakeTimeoutSecond*time.Second
 	ws.WSServer.ReadTimeout = ws.wsCfg.ReadTimeoutSecond*time.Second