diff --git a/iot_device.go b/iot_device.go
index 54a6410..9330ef2 100644
--- a/iot_device.go
+++ b/iot_device.go
@@ -366,28 +366,28 @@ func (device *iotDevice) createMessageMqttHandler() func(client mqtt.Client, mes
 
 func (device *iotDevice) createCommandMqttHandler() func(client mqtt.Client, message mqtt.Message) {
 	commandHandler := func(client mqtt.Client, message mqtt.Message) {
-		command := &Command{}
-		if json.Unmarshal(message.Payload(), command) != nil {
-			glog.Warningf("unmarshal platform command failed,device id = %s，message = %s", device.Id, message)
-		}
-
-		handleFlag := true
-		for _, handler := range device.commandHandlers {
-			handleFlag = handleFlag && handler(*command)
-		}
-		var res string
-		if handleFlag {
-			glog.Infof("device %s handle command success", device.Id)
-			res = Interface2JsonString(CommandResponse{
-				ResultCode: 0,
-			})
-		} else {
-			glog.Warningf("device %s handle command failed", device.Id)
-			res = Interface2JsonString(CommandResponse{
-				ResultCode: 1,
-			})
-		}
 		go func() {
+			command := &Command{}
+			if json.Unmarshal(message.Payload(), command) != nil {
+				glog.Warningf("unmarshal platform command failed,device id = %s，message = %s", device.Id, message)
+			}
+
+			handleFlag := true
+			for _, handler := range device.commandHandlers {
+				handleFlag = handleFlag && handler(*command)
+			}
+			var res string
+			if handleFlag {
+				glog.Infof("device %s handle command success", device.Id)
+				res = Interface2JsonString(CommandResponse{
+					ResultCode: 0,
+				})
+			} else {
+				glog.Warningf("device %s handle command failed", device.Id)
+				res = Interface2JsonString(CommandResponse{
+					ResultCode: 1,
+				})
+			}
 			if token := device.client.Publish(FormatTopic(CommandResponseTopic, device.Id)+GetTopicRequestId(message.Topic()), 1, false, res);
 				token.Wait() && token.Error() != nil {
 				glog.Infof("device %s send command response failed", device.Id)
diff --git a/samples/command/platform_command.go b/samples/command/platform_command.go
index e8b2dda..f56d492 100644
--- a/samples/command/platform_command.go
+++ b/samples/command/platform_command.go
@@ -22,6 +22,7 @@ func main() {
 	// 添加用于处理平台下发命令的callback
 	device.AddCommandHandler(func(command iot.Command) bool {
 		fmt.Println("I get command from platform")
+		time.Sleep(10 * time.Second)
 		return true
 	})
 	time.Sleep(10 * time.Minute)