diff --git a/meituan_fenxiao/api.go b/meituan_fenxiao/api.go
index a3cc5f8..536850c 100644
--- a/meituan_fenxiao/api.go
+++ b/meituan_fenxiao/api.go
@@ -58,9 +58,15 @@ func MeituanFenXiaoGetSign(param map[string]interface{}) string {
 	str := ""
 	info, ok := param["geo"].(map[string]interface{})
 	if ok {
-		param["cityId"] = info["cityId"]
-		param["lat"] = info["lat"]
-		param["lng"] = info["lng"]
+		if info["cityId"] != "" {
+			param["cityId"] = info["cityId"]
+		}
+		if info["lat"] != "" {
+			param["lat"] = info["lat"]
+		}
+		if info["lng"] != "" {
+			param["lng"] = info["lng"]
+		}
 	}
 	delete(param, "geo")
 	keys := comm.KsortToStrInterface(param)