diff --git a/.eslintignore b/.eslintignore
index c548fb5a568e75974bf88f4d2e50acf045456bc9..b478450fa31d28a0229dfd993cff9a20e2ed1a7e 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -34,3 +34,4 @@ packages/uni-stat
 node_modules
 automator.js
 uni.automator.js
+uni-polyfill.js
diff --git a/packages/uni-cli-shared/lib/uni-polyfill.js b/packages/uni-cli-shared/lib/uni-polyfill.js
new file mode 100644
index 0000000000000000000000000000000000000000..21fc12d34261ec7ef39b4940f79df6c5043ca621
--- /dev/null
+++ b/packages/uni-cli-shared/lib/uni-polyfill.js
@@ -0,0 +1,17 @@
+if (typeof Promise !== 'undefined' && !Promise.prototype.finally) {
+  Promise.prototype.finally = function (callback) {
+    var promise = this.constructor
+    return this.then(function (value) {
+      return promise.resolve(callback()).then(function () {
+        return value
+      })
+    }, function (reason) {
+      return promise.resolve(callback()).then(function () {
+        throw reason
+      })
+    })
+  }
+}
+if (uni.base64ToArrayBuffer) {
+  ArrayBuffer = uni.base64ToArrayBuffer('').constructor
+}
diff --git a/packages/vue-cli-plugin-hbuilderx/build/webpack.nvue.conf.js b/packages/vue-cli-plugin-hbuilderx/build/webpack.nvue.conf.js
index 0f531ac0f29904b3bf5de9aeeeb13f2a7d00de43..432077faf78f9d28bec072a1a5246df0db46427b 100644
--- a/packages/vue-cli-plugin-hbuilderx/build/webpack.nvue.conf.js
+++ b/packages/vue-cli-plugin-hbuilderx/build/webpack.nvue.conf.js
@@ -316,6 +316,7 @@ module.exports = function () {
       extensions: ['.js', '.nvue', '.vue', '.json'],
       alias: {
         '@': process.env.UNI_INPUT_DIR,
+        'uni-polyfill': require.resolve('@dcloudio/uni-cli-shared/lib/uni-polyfill.js'),
         'uni-pages': path.resolve(process.env.UNI_INPUT_DIR, 'pages.json'),
         'uni-app-style': path.resolve(process.env.UNI_INPUT_DIR, getNVueMainEntry()) + '?' + JSON.stringify({
           type: 'appStyle'
diff --git a/packages/vue-cli-plugin-hbuilderx/packages/webpack-uni-nvue-loader/lib/main.js b/packages/vue-cli-plugin-hbuilderx/packages/webpack-uni-nvue-loader/lib/main.js
index e13b03d7a8fac163f9abf73333cf395a01221971..a038a0f920bcf09bc977edfcfc9fbefad692b09c 100644
--- a/packages/vue-cli-plugin-hbuilderx/packages/webpack-uni-nvue-loader/lib/main.js
+++ b/packages/vue-cli-plugin-hbuilderx/packages/webpack-uni-nvue-loader/lib/main.js
@@ -59,22 +59,8 @@ module.exports = function (content, map) {
         return `
         ${statCode}
         import 'uni-app-style'
+        import 'uni-polyfill'
         import App from './${normalizePath(params.page)}.nvue?mpType=page'
-        if (typeof Promise !== 'undefined' && !Promise.prototype.finally) {
-          Promise.prototype.finally = function(callback) {
-            var promise = this.constructor
-            return this.then(function(value) {
-              return promise.resolve(callback()).then(function() {
-                return value
-              })
-            }, function(reason) {
-              return promise.resolve(callback()).then(function() {
-                throw reason
-              })
-            })
-          }
-        }
-        ArrayBuffer = uni.base64ToArrayBuffer('').constructor
         App.mpType = 'page'
         App.route = '${params.page}'
         App.el = '#root'
diff --git a/packages/webpack-uni-pages-loader/lib/platforms/app-plus/define-pages.js b/packages/webpack-uni-pages-loader/lib/platforms/app-plus/define-pages.js
index 6161496f3417720e2597e6ef7b933e7edb9f49c6..1a67f616ca78b337fbcb574e2858b26885e1fd8f 100644
--- a/packages/webpack-uni-pages-loader/lib/platforms/app-plus/define-pages.js
+++ b/packages/webpack-uni-pages-loader/lib/platforms/app-plus/define-pages.js
@@ -1,3 +1,5 @@
+const fs = require('fs')
+
 function generatePageCode (pages, pageOptions) {
   return pages.map(pagePath => {
     if (pageOptions[pagePath].nvue) {
@@ -11,24 +13,15 @@ function generateUniConfig (appJson, isAppView) {
   return isAppView ? `window.__uniConfig = ${JSON.stringify({ window: appJson.window }, null)};` : ''
 }
 
+function generatePolyfill () {
+  return fs.readFileSync(require.resolve('@dcloudio/uni-cli-shared/lib/uni-polyfill.js'), { encoding: 'utf8' })
+}
+
 module.exports = function definePages (appJson, isAppView) {
   return {
     name: 'define-pages.js',
     content: `
-if (typeof Promise !== 'undefined' && !Promise.prototype.finally) {
-  Promise.prototype.finally = function(callback) {
-    const promise = this.constructor
-    return this.then(
-      value => promise.resolve(callback()).then(() => value),
-      reason => promise.resolve(callback()).then(() => {
-        throw reason
-      })
-    )
-  }
-}
-if(uni.base64ToArrayBuffer){
-  ArrayBuffer = uni.base64ToArrayBuffer('').constructor
-}
+${generatePolyfill()}
 ${generateUniConfig(appJson, isAppView)}
 if(uni.restoreGlobal){
   uni.restoreGlobal(weex,plus,setTimeout,clearTimeout,setInterval,clearInterval)