diff --git a/platformapi/sfps2/sf_model.go b/platformapi/sfps2/sf_model.go
index 62c7d978..890242f2 100644
--- a/platformapi/sfps2/sf_model.go
+++ b/platformapi/sfps2/sf_model.go
@@ -164,7 +164,7 @@ type PreCreateOrderReq struct {
 type PreCreateOrderResp struct {
 	ChargePriceList        *ChargePriceList `json:"charge_price_list"`
 	DeliveryType           float64          `json:"delivery_type"` //0：预约送达单 1：立即单 3：预约上门单
-	EstimateCouponDetail   []interface{}    `json:"estimate_coupon_detail"`
+	EstimateCouponDetail   interface{}      `json:"estimate_coupon_detail"`
 	EstimateCouponTotalFee float64          `json:"estimate_coupon_total_fee"`
 	EstimatePayMoney       float64          `json:"estimate_pay_money"`
 	ExpectTime             float64          `json:"expect_time"`