diff --git a/utils/helper.go b/utils/helper.go
index 6a164ea..d9798ba 100644
--- a/utils/helper.go
+++ b/utils/helper.go
@@ -62,30 +62,22 @@ func Md5(text string) string {
 //	@param privateKey
 //	@return string
 func MakeSign(obj interface{}, privateKey string) string {
-	signmap := map[string]interface{}{}
 	valueOfObj := reflect.ValueOf(obj)
-	for i := 0; i < valueOfObj.NumField(); i++ {
-		signmap[valueOfObj.Type().Field(i).Name] = valueOfObj.Field(i)
-	}
+	keysCount := valueOfObj.NumField()
 
-	//进行键排序
-	keys := make([]string, len(signmap))
-	j := 0
-	for k := range signmap {
-		keys[j] = k
-		j++
+	keys := make([]string, keysCount)
+	for i := 0; i < keysCount; i++ {
+		keys[i] = valueOfObj.Type().Field(i).Name
 	}
-
 	sort.Strings(keys)
-	//获取 value 值，拼接成一行
+
 	str := ""
-	for _, k := range keys {
-		if strings.ToLower(k) == "sign" {
-			continue
-		}
-		if v, ok := signmap[k]; ok {
-			str = fmt.Sprintf("%s%s=%v&", str, strings.ToLower(k), v)
-		}
+	currentKey := ""
+	var currentValue reflect.Value
+	for j := 0; j < keysCount; j++ {
+		currentKey = strings.ToLower(keys[j])
+		currentValue = valueOfObj.FieldByName(keys[j])
+		str = fmt.Sprintf("%s%s=%v&", str, currentKey, currentValue)
 	}
 
 	return Md5(str + "key=" + privateKey)