diff --git a/platformapi/fnpsapi/order.go b/platformapi/fnpsapi/order.go
index df6b9166..d5df87ee 100644
--- a/platformapi/fnpsapi/order.go
+++ b/platformapi/fnpsapi/order.go
@@ -183,8 +183,12 @@ func (a *API) CancelOrder(req *CancelOrderReq) (err error) {
 // 查询订单详情接口 todo
 func (a *API) QueryOrder(partnerOrderCode string) (result *GetOrderDetailRes, err error) {
 	orderHead := a.MakeFnRequestHead()
-	orderHead["business_data"] = partnerOrderCode
+	bytes, err := json.Marshal(&GetOrderDetailReq{PartnerOrderCode: partnerOrderCode})
+	if err != nil {
+		return nil, err
+	}
 
+	orderHead["business_data"] = string(bytes)
 	data, err := a.AccessAPI(ApiURL, "getOrderDetail", RequestPost, orderHead)
 	if err != nil {
 		return nil, err