diff --git a/src/main/utils/tcYunUpload.js b/src/main/utils/tcYunUpload.js
index 1e9267d..eb1cf66 100644
--- a/src/main/utils/tcYunUpload.js
+++ b/src/main/utils/tcYunUpload.js
@@ -5,21 +5,33 @@ import { Notification, clipboard } from 'electron'
 import crypto from 'crypto'
 
 // generate COS signature string
-const generateSignature = () => {
+const generateSignature = (fileName) => {
   const options = db.read().get('picBed.tcyun').value()
   const secretId = options.secretId
   const secretKey = options.secretKey
   const appId = options.appId
   const bucket = options.bucket
-  const random = Math.floor(Math.random() * 10000000000)
-  const current = parseInt(new Date().getTime() / 1000) - 1
-  const expired = current + 3600
+  let signature
+  if (!options.version || options.version === 'v4') {
+    const random = Math.floor(Math.random() * 10000000000)
+    const current = parseInt(new Date().getTime() / 1000) - 1
+    const expired = current + 3600
 
-  const multiSignature = `a=${appId}&b=${bucket}&k=${secretId}&e=${expired}&t=${current}&r=${random}&f=`
+    const multiSignature = `a=${appId}&b=${bucket}&k=${secretId}&e=${expired}&t=${current}&r=${random}&f=`
 
-  const signHexKey = crypto.createHmac('sha1', secretKey).update(multiSignature).digest()
-  const tempString = Buffer.concat([signHexKey, Buffer.from(multiSignature)])
-  const signature = Buffer.from(tempString).toString('base64')
+    const signHexKey = crypto.createHmac('sha1', secretKey).update(multiSignature).digest()
+    const tempString = Buffer.concat([signHexKey, Buffer.from(multiSignature)])
+    signature = Buffer.from(tempString).toString('base64')
+  } else {
+    const today = Math.floor(new Date().getTime() / 1000)
+    const tomorrow = today + 86400
+    const signTime = `${today};${tomorrow}`
+    const signKey = crypto.createHmac('sha1', secretKey).update(signTime).digest('hex')
+    const httpString = `put\n/${options.path}${fileName}\n\nhost=${options.bucket}.cos.${options.area}.myqcloud.com\n`
+    const sha1edHttpString = crypto.createHash('sha1').update(httpString).digest('hex')
+    const stringToSign = `sha1\n${signTime}\n${sha1edHttpString}\n`
+    signature = crypto.createHmac('sha1', signKey).update(stringToSign).digest('hex')
+  }
   return {
     signature,
     appId,
@@ -28,19 +40,38 @@ const generateSignature = () => {
 }
 
 const postOptions = (fileName, signature, imgBase64) => {
-  const area = db.read().get('picBed.tcyun.area').value()
-  const path = db.read().get('picBed.tcyun.path').value()
-  return {
-    method: 'POST',
-    url: `http://${area}.file.myqcloud.com/files/v2/${signature.appId}/${signature.bucket}/${path}${fileName}`,
-    headers: {
-      Host: `${area}.file.myqcloud.com`,
-      Authorization: signature.signature,
-      contentType: 'multipart/form-data'
-    },
-    formData: {
-      op: 'upload',
-      filecontent: Buffer.from(imgBase64, 'base64')
+  const options = db.read().get('picBed.tcyun').value()
+  const area = options.area
+  const path = options.path
+  console.log(options.verison)
+  if (!options.version || options.version === 'v4') {
+    return {
+      method: 'POST',
+      url: `http://${area}.file.myqcloud.com/files/v2/${signature.appId}/${signature.bucket}/${path}${fileName}`,
+      headers: {
+        Host: `${area}.file.myqcloud.com`,
+        Authorization: signature.signature,
+        contentType: 'multipart/form-data'
+      },
+      formData: {
+        op: 'upload',
+        filecontent: Buffer.from(imgBase64, 'base64')
+      }
+    }
+  } else {
+    return {
+      method: 'PUT',
+      url: `http://${options.bucket}.cos.${options.area}.myqcloud.com/${path}${fileName}`,
+      headers: {
+        Host: `${options.bucket}.cos.${options.area}.myqcloud.com`,
+        Authorization: signature.signature,
+        contentType: 'multipart/form-data'
+      },
+      formData: {
+        op: 'upload',
+        filecontent: Buffer.from(imgBase64, 'base64')
+      },
+      resolveWithFullResponse: true
     }
   }
 }
@@ -50,15 +81,18 @@ const tcYunUpload = async (img, type, webContents) => {
     webContents.send('uploadProgress', 0)
     const imgList = await img2Base64[type](img)
     webContents.send('uploadProgress', 30)
-    const singature = generateSignature()
     const length = imgList.length
     const tcYunOptions = db.read().get('picBed.tcyun').value()
     const customUrl = tcYunOptions.customUrl
     const path = tcYunOptions.path
     for (let i in imgList) {
+      const singature = generateSignature(imgList[i].fileName)
       const options = postOptions(imgList[i].fileName, singature, imgList[i].base64Image)
+      console.log(123, options)
       const res = await request(options)
-      const body = JSON.parse(res)
+      // const body = JSON.parse(res)
+      const body = `${res}`
+      console.log(body)
       if (body.message === 'SUCCESS') {
         delete imgList[i].base64Image
         if (customUrl) {
diff --git a/src/renderer/components/SettingView/TcYun.vue b/src/renderer/components/SettingView/TcYun.vue
index 77adcf7..0a137c0 100644
--- a/src/renderer/components/SettingView/TcYun.vue
+++ b/src/renderer/components/SettingView/TcYun.vue
@@ -11,6 +11,19 @@
           label-width="120px"
           :model="form"
           size="mini">
+          <el-form-item
+            label="COS版本"
+          >
+            <el-switch
+              v-model="form.version"
+              active-text="v4"
+              inactive-text="v5"
+              active-value="v4"
+              inactive-value="v5"
+              inactive-color="#67C23A"
+            ></el-switch>
+            <i class="el-icon-question" @click="openWiki"></i>
+          </el-form-item>
           <el-form-item
             label="设定SecretId"
             prop="secretId"
@@ -86,7 +99,8 @@ export default {
         appId: '',
         area: '',
         path: '',
-        customUrl: ''
+        customUrl: '',
+        version: 'v4'
       }
     }
   },
@@ -113,6 +127,9 @@ export default {
           return false
         }
       })
+    },
+    openWiki () {
+      this.$electron.remote.shell.openExternal('https://github.com/Molunerfinn/PicGo/wiki/%E8%AF%A6%E7%BB%86%E7%AA%97%E5%8F%A3%E7%9A%84%E4%BD%BF%E7%94%A8#%E5%BE%AE%E5%8D%9A%E5%9B%BE%E5%BA%8A')
     }
   }
 }
@@ -147,4 +164,17 @@ export default {
     .el-radio-button__inner
       border-left none
       border-radius 0 14px 14px 0
+  .el-switch__label
+    color #eee
+    &.is-active
+      color #409EFF
+  .el-icon-question
+    font-size 20px
+    float right
+    margin-top 9px
+    color #eee
+    cursor pointer
+    transition .2s color ease-in-out
+    &:hover
+      color #409EFF
 </style>
\ No newline at end of file