diff --git a/platformapi/mtpsapi/mtpsapi.go b/platformapi/mtpsapi/mtpsapi.go
index 48a598fb..1927c1c9 100644
--- a/platformapi/mtpsapi/mtpsapi.go
+++ b/platformapi/mtpsapi/mtpsapi.go
@@ -2,6 +2,7 @@ package mtpsapi
 
 import (
 	"crypto/sha1"
+	"errors"
 	"fmt"
 	"git.rosy.net.cn/baseapi/platformapi"
 	"git.rosy.net.cn/baseapi/utils"
@@ -10,6 +11,7 @@ import (
 	"sort"
 	"strconv"
 	"strings"
+	"time"
 )
 
 const (
@@ -487,6 +489,23 @@ func (a *API) CheckOrder(shopID, receiver_address string, receiver_lng, receiver
 	return result, err
 }
 
+// 添加小费
+func (a *API) AddTip(orderId, deliveryId string, tip int64) error {
+	result, err := a.AccessAPI("order/addTip", map[string]interface{}{
+		"delivery_id":   orderId,
+		"mt_peisong_id": deliveryId,
+		"tip_amount":    tip,
+		"serial_number": utils.Int64ToStr(time.Now().Unix()),
+	})
+	if err != nil {
+		return err
+	}
+	if result.Code != 0 {
+		return errors.New(result.Message)
+	}
+	return nil
+}
+
 func IsOpen(err error) bool {
 	if err == nil {
 		return true