diff --git a/cluster/cluster.go b/cluster/cluster.go
index 420680a..7cfe639 100644
--- a/cluster/cluster.go
+++ b/cluster/cluster.go
@@ -19,7 +19,10 @@ type RpcClient struct {
 	nodeid     int
 	pclient    *rpc.Client
 	serverAddr string
-	isConnect  bool
+}
+
+func (slf *RpcClient) IsConnected() bool {
+	return (slf.pclient != nil) && (slf.pclient.IsClosed() == false)
 }
 
 type CCluster struct {
@@ -131,7 +134,7 @@ func (slf *CCluster) ConnService() error {
 			if node.NodeID == slf.cfg.currentNode.NodeID {
 				continue
 			}
-			slf.nodeclient[node.NodeID] = &RpcClient{node.NodeID, nil, node.ServerAddr, false}
+			slf.nodeclient[node.NodeID] = &RpcClient{node.NodeID, nil, node.ServerAddr}
 		}
 	}
 
@@ -139,14 +142,13 @@ func (slf *CCluster) ConnService() error {
 		for _, rpcClient := range slf.nodeclient {
 
 			//连接状态发送ping
-			if rpcClient.isConnect == true {
+			if rpcClient.IsConnected() == true {
 				ping.TimeStamp = 0
 				err := rpcClient.pclient.Call("CPing.Ping", &ping, &pong)
 
 				if err != nil {
 					rpcClient.pclient.Close()
 					rpcClient.pclient = nil
-					rpcClient.isConnect = false
 					continue
 				}
 
@@ -168,10 +170,9 @@ func (slf *CCluster) ConnService() error {
 
 			v, _ := slf.nodeclient[rpcClient.nodeid]
 			v.pclient = client
-			v.isConnect = true
 		}
 
-		time.Sleep(time.Second * 2)
+		time.Sleep(time.Second * 4)
 	}
 
 	return nil
@@ -305,7 +306,7 @@ func (slf *CCluster) GetNodeIdByServiceName(servicename string, bOnline bool) []
 	if bOnline {
 		ret := make([]int, 0, len(nodeIDList))
 		for _, nodeid := range nodeIDList {
-			if slf.CheckNodeIsOnlineByID(nodeid) {
+			if slf.CheckNodeIsConnectedByID(nodeid) {
 				ret = append(ret, nodeid)
 			}
 		}
@@ -315,8 +316,22 @@ func (slf *CCluster) GetNodeIdByServiceName(servicename string, bOnline bool) []
 	return slf.cfg.GetIdByService(servicename)
 }
 
-func (slf *CCluster) CheckNodeIsOnlineByID(nodeid int) bool {
-	return true
+func (slf *CCluster) CheckNodeIsConnectedByID(nodeid int) bool {
+	pclient := slf.GetRpcClientByNodeId(nodeid)
+	if pclient == nil {
+		return false
+	}
+
+	return pclient.IsConnected()
+}
+
+func (slf *CCluster) GetRpcClientByNodeId(nodeid int) *RpcClient {
+	pclient, ok := slf.nodeclient[nodeid]
+	if ok == false {
+		return nil
+	}
+
+	return pclient
 }
 
 func (slf *CCluster) Go(bCast bool, NodeServiceMethod string, args interface{}, queueModle bool) error {
diff --git a/rpc/client.go b/rpc/client.go
index bda7a33..7825359 100644
--- a/rpc/client.go
+++ b/rpc/client.go
@@ -70,6 +70,12 @@ type ClientCodec interface {
 	Close() error
 }
 
+func (client *Client) IsClosed() bool {
+	client.reqMutex.Lock()
+	defer client.reqMutex.Unlock()
+	return client.shutdown || client.closing
+}
+
 func (client *Client) send(call *Call, queueMode bool) {
 	client.reqMutex.Lock()
 	defer client.reqMutex.Unlock()