diff --git a/README.md b/README.md
index 7267dd7..6165ddd 100644
--- a/README.md
+++ b/README.md
@@ -10,12 +10,15 @@
 > 选择对应的版本进行下载,进入到解压目录执行
 ```bash
 ./webdav -rt="your refreshToken"
+# 或者
+echo "your refreshToken" > /path/to/save/refreshToken
+./webdav -rt /path/to/save/refreshToken
 ```
 
 # 参数说明
 ```bash
 -rt
-    阿里云盘的refreshToken，获取方式见下文
+    阿里云盘的refreshToken，获取方式见下文。或者包含refreshToken的文件路径。
 -port
     非必填，服务器端口号，默认为8085
 -user
diff --git a/aliyun/api.go b/aliyun/api.go
index 18bfebe..7ae7c18 100644
--- a/aliyun/api.go
+++ b/aliyun/api.go
@@ -3,6 +3,8 @@ package aliyun
 import (
 	"encoding/json"
 	"fmt"
+	"os"
+	"io/ioutil"
 	"go-aliyun-webdav/aliyun/cache"
 	"go-aliyun-webdav/aliyun/model"
 	"go-aliyun-webdav/aliyun/net"
@@ -111,6 +113,14 @@ func GetFile(w http.ResponseWriter, url string, token string, rangeStr string, i
 }
 
 func RefreshToken(refreshToken string) model.RefreshTokenModel {
+	path := refreshToken
+	if _, err := os.Stat(path); err == nil {
+		buf, _ := ioutil.ReadFile(path)
+		refreshToken = string(buf)
+		if(len(refreshToken) >= 32){
+			refreshToken = refreshToken[:32] // refreshToken is only 32 bit?? FIXME
+		}
+	}
 	rs := net.Post(model.APIREFRESHTOKENURL, "", []byte(`{"refresh_token":"`+refreshToken+`"}`))
 	var refresh model.RefreshTokenModel
 	if len(rs) > 0 {
@@ -122,6 +132,13 @@ func RefreshToken(refreshToken string) model.RefreshTokenModel {
 	} else {
 		fmt.Println("刷新token失败")
 	}
+
+	if _, err := os.Stat(path); err == nil {
+		if(refreshToken != refresh.RefreshToken){
+			content := []byte(refresh.RefreshToken)
+			ioutil.WriteFile(path, content, 0600)
+		}
+	}
 	return refresh
 
 }