diff --git a/controllers/api_controller.go b/controllers/api_controller.go
index 1e3069037..0505f2d75 100644
--- a/controllers/api_controller.go
+++ b/controllers/api_controller.go
@@ -168,7 +168,7 @@ func (c *ApiController) DoPrint(dataMap map[string]interface{}) (data string, er
 	}
 	textChan = make(chan string, 10)
 	textChan <- data
-	connHandler(conn)
+	go connHandler(conn)
 	return data, err
 }
 
@@ -184,8 +184,8 @@ func connHandler(c net.Conn) {
 		//写入数据
 		printData := hex.EncodeToString([]byte(s))
 		lenData := int64(len(str) + len(const1) + len(orderNo) + len(printInit) + len(voice) + 1 + 2 + len(printData))
-		x1, x2 := int2h8l8(lenData)
-		data := const1 + x1 + x2 + orderNo + printInit + voice + printData + check
+		x1, x2 := int2h8l8(lenData / 2)
+		data := str + x1 + x2 + const1 + orderNo + printInit + voice + printData + check
 		n, err := c.Write([]byte(data))
 		if err != nil {
 			fmt.Println("Write err:", err, n)