diff --git a/platformapi/mtwmapi/order.go b/platformapi/mtwmapi/order.go
index 8f50e0f3..4b652036 100644
--- a/platformapi/mtwmapi/order.go
+++ b/platformapi/mtwmapi/order.go
@@ -575,9 +575,23 @@ func (a *API) GetOrderDaySeq(poiCode string) (daySeq int, err error) {
 	return daySeq, err
 }
 
+func (a *API) GetOrderIdByDaySeqSingle(poiCode string, dateTime time.Time, daySeq int) (vendorOrderID int64, err error) {
+	params := map[string]interface{}{
+		KeyAppPoiCode: poiCode,
+		"date_time":   dateTime.Format("20060102"),
+		"day_seq":     daySeq,
+	}
+	result, err := a.AccessAPI("order/getOrderIdByDaySeq", true, params)
+	if err == nil {
+		vendorOrderID = utils.ForceInterface2Int64(result.(map[string]interface{})["order_id"])
+	}
+	return vendorOrderID, err
+}
+
 // 订单流水号的开始序号，门店内每日的订单流水号都是从1开始。
 // 订单流水号的结束序号，注意开始流水号与结束流水号的跨度需小于100，即差值最大为99
 // 这个函数在给定的区间范围全部没有订单时，返回错误808，但如果有部分订单，返回的错误是0
+// 此API速度与查询的区间范围直接相关，越大越慢（即使订单不存在），最大可到4，5秒级别
 func (a *API) GetOrderIdByDaySeq(poiCode string, dateTime time.Time, seqStart, seqEnd int) (vendorOrderIDs []int64, err error) {
 	params := map[string]interface{}{
 		KeyAppPoiCode:   poiCode,
diff --git a/platformapi/mtwmapi/order_test.go b/platformapi/mtwmapi/order_test.go
index 444d3130..207afabb 100644
--- a/platformapi/mtwmapi/order_test.go
+++ b/platformapi/mtwmapi/order_test.go
@@ -121,7 +121,15 @@ func TestGetOrderActDetaill(t *testing.T) {
 }
 
 func TestGetOrderIdByDaySeq(t *testing.T) {
-	result, err := api.GetOrderIdByDaySeq("7111597", utils.Time2Date(time.Now()), 1, 100)
+	result, err := api.GetOrderIdByDaySeq("7111597", utils.Time2Date(time.Now()), 1, MaxGap4GetOrderIdByDaySeq)
+	t.Log(utils.Format4Output(result, false))
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestGetOrderIdByDaySeqSingle(t *testing.T) {
+	result, err := api.GetOrderIdByDaySeqSingle("7111597", utils.Time2Date(time.Now()), 1)
 	t.Log(utils.Format4Output(result, false))
 	if err != nil {
 		t.Fatal(err)