diff --git a/README.md b/README.md
index 4d1342c..d92c9de 100644
--- a/README.md
+++ b/README.md
@@ -1,39 +1,46 @@
-```js
+#### 签名/解密方法实现
+```javascript
+// 安装包引用：
 import SHA1 from 'crypto-js/sha1'
 import { sm4 } from 'miniprogram-sm-crypto'
-
-// 接口签名
+// 接口加密
 export const genSign = params => {
-  // 获取预先设置为环境变量的 APPKEY
-  let key = '{your secreat-key}'
-  let keys = []
-  for (let key in params) {
-    keys.push(key)
-  }
-  // 参数名 ASCII 码从小到大排序（字典序）
-  keys.sort()
-  // 转成键值对
-  let paramPair = []
-  for (let i = 0, len = keys.length; i < len; i++) {
-    let k = keys[i]
-    let itm = params[k]
-    if (typeof itm == 'object') {
-      itm = JSON.stringify(itm)
+    ;(params || {}).timestamp = new Date().getTime()
+    // 删除值为空以及为undefined的数据
+    let newParam = {}
+    for (let key in params) {
+        if (params[key] !== '' && typeof params[key] != 'undefined')
+            newParam[key] = params[key]
     }
-    paramPair.push(k + '=' + itm) // base64 编码
-  }
-  // 最后加上 key
-  paramPair.push('key=' + key)
-  // 拼接
-  let stringSignTemp = paramPair.join('&')
-
-  console.log('stringSignTemp:' + stringSignTemp)
-  let sign = SHA1(stringSignTemp).toString().toUpperCase()
-
-  return sign
+    params = newParam
+    // 获取预先设置为环境变量的 APPKEY
+    let key = '6612af2ed3b6119792a7340f894f46124130ed62'
+    let keys = []
+    for (let key in params) {
+        keys.push(key)
+    }
+    // 参数名 ASCII 码从小到大排序（字典序）
+    keys.sort()
+    // 转成键值对
+    let paramPair = []
+    for (let i = 0, len = keys.length; i < len; i++) {
+        let k = keys[i]
+        let itm = params[k]
+        if (typeof itm == 'object') {
+            itm = JSON.stringify(itm)
+        }
+        paramPair.push(k + '=' + itm) // base64 编码
+    }
+    // 最后加上 key
+    paramPair.push('key=' + key)
+    // 拼接
+    let stringSignTemp = paramPair.join('&')
+    console.log('stringSignTemp:' + stringSignTemp)
+    let sign = SHA1(stringSignTemp).toString().toUpperCase()
+    return sign
 }
 
-// 数据解密
+// 解密
 export const decodeData = data => {
     //字符串转byte数组
     const stringToByte = function (str) {
@@ -60,8 +67,24 @@ export const decodeData = data => {
         }
         return bytes
     }
-    const key = stringToByte('{your secreat-key1}')
+    const key = stringToByte('1ba10d7bb99d9df8')
     return sm4.decrypt(data, key)
 }
-
+```
+#### 使用示例
+- 加密 :
+```javascript
+let signString =config.method == 'post' ? genSign(config.data) : genSign(config.params)
+```
+- 解密:
+```javascript
+let data=JSON.parse(decodeData(response.data.data))
+```
+#### 注意
+```javascript
+// 注意：因为浏览器会把get请求参数里面的空格用 '+'连接起来，这里需要引入qs包进行处理:
+import QS from 'qs'
+axios.defaults.paramsSerializer = function (params) {
+return QS.stringify(params, { arrayFormat: 'brackets' })
+}
 ```
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