diff --git a/nreflect/convert.go b/nreflect/convert.go
index f883333..8683052 100644
--- a/nreflect/convert.go
+++ b/nreflect/convert.go
@@ -10,6 +10,37 @@ import (
 	"strconv"
 )
 
+type ConvertFn func(t reflect.Type, value reflect.Value) string
+
+// StructToStrMap convert struct to string map, json tag
+func StructToStrMap(v any, fn ConvertFn) map[string]string {
+	// 返回 key-value
+	ret := make(map[string]string)
+	rType := reflect.TypeOf(v)
+	rValue := reflect.ValueOf(v)
+
+	rValue = Indirect(rValue)
+	if rType.Kind() == reflect.Ptr {
+		rType = rType.Elem()
+	}
+
+	for i := 0; i < rType.NumField(); i++ {
+		rField := rType.Field(i)
+		jsonTag := rField.Tag.Get("json")
+		if jsonTag == "" || jsonTag == "-" {
+			continue
+		}
+		//rField.Type
+		if fn == nil {
+			fn = func(t reflect.Type, value reflect.Value) string {
+				return String(value)
+			}
+		}
+		ret[jsonTag] = fn(rField.Type, rValue.Field(i))
+	}
+	return ret
+}
+
 // BaseTypeVal convert custom type or intX,uintX,floatX to generic base type.
 //
 //	intX/unitX 	=> int64