diff --git a/packages/vue-cli-plugin-uni/commands/build.js b/packages/vue-cli-plugin-uni/commands/build.js
index a390d3224da41e2af839ec49cb785f2c9d69b746..bf66955831cc9f20fcf5e1d6732f97ff8aef0c12 100644
--- a/packages/vue-cli-plugin-uni/commands/build.js
+++ b/packages/vue-cli-plugin-uni/commands/build.js
@@ -34,7 +34,7 @@ module.exports = (api, options) => {
       '--auto-host': 'specify automator host',
       '--auto-port': 'specify automator port',
       '--subpackage': 'specify subpackage',
-      '--plugin': 'specify plugin',
+      '--plugin': 'specify mp plugin',
       '--manifest': 'build manifest.json'
     }
   }, async (args) => {
@@ -244,17 +244,19 @@ function analysisPluginDir () {
   const pluginJson = parseJson(fs.readFileSync(pluginJsonPath, 'utf-8'), true)
 
   // main 入口文件是否存在
-  process.env.UNI_MP_PLUGIN_MAIN = pluginJson.main
-  const UNI_MP_PLUGIN_MAIN = process.env.UNI_MP_PLUGIN_MAIN
-  const mainFilePath = path.resolve(process.env.UNI_INPUT_DIR, UNI_MP_PLUGIN_MAIN)
-
-  if (UNI_MP_PLUGIN_MAIN && !fs.pathExistsSync(mainFilePath)) {
-    console.log()
-    console.error(uniI18n.__('pluginUni.entryDileNoExistsCheckAfterRetry', {
-      0: UNI_MP_PLUGIN_MAIN
-    }))
-    console.log()
-    process.exit(0)
+  if (pluginJson.main) {
+    process.env.UNI_MP_PLUGIN_MAIN = pluginJson.main
+    const UNI_MP_PLUGIN_MAIN = process.env.UNI_MP_PLUGIN_MAIN
+    const mainFilePath = path.resolve(process.env.UNI_INPUT_DIR, UNI_MP_PLUGIN_MAIN)
+  
+    if (UNI_MP_PLUGIN_MAIN && !fs.pathExistsSync(mainFilePath)) {
+      console.log()
+      console.error(uniI18n.__('pluginUni.entryDileNoExistsCheckAfterRetry', {
+        0: UNI_MP_PLUGIN_MAIN
+      }))
+      console.log()
+      process.exit(0)
+    }
   }
 }
 
diff --git a/packages/vue-cli-plugin-uni/lib/mp/index.js b/packages/vue-cli-plugin-uni/lib/mp/index.js
index d37a80a2b40b8acc2ad0ad53d2fc8a879c5217fd..905b89a32e9127154caf51d0f7d994cc1d48505b 100644
--- a/packages/vue-cli-plugin-uni/lib/mp/index.js
+++ b/packages/vue-cli-plugin-uni/lib/mp/index.js
@@ -178,11 +178,12 @@ module.exports = {
 
     {
       const globalEnv = process.env.UNI_PLATFORM === 'mp-alipay' ? 'my' : 'wx';
-      [].concat(process.env.UNI_MP_PLUGIN ? process.env.UNI_MP_PLUGIN_MAIN : JSON.parse(process.env
-        .UNI_MP_PLUGIN_EXPORT))
-        .forEach(fileName => addToUniEntry(fileName))
-      beforeCode +=
-        `${globalEnv}.__webpack_require_${(process.env.UNI_MP_PLUGIN || 'UNI_MP_PLUGIN').replace(/-/g, '_')}__ = __webpack_require__;`
+      [].concat(
+        process.env.UNI_MP_PLUGIN
+          ? process.env.UNI_MP_PLUGIN_MAIN
+          : JSON.parse(process.env.UNI_MP_PLUGIN_EXPORT)
+      ).forEach(fileName => addToUniEntry(fileName))
+      beforeCode += `${globalEnv}.__webpack_require_UNI_MP_PLUGIN__ = __webpack_require__;`
     }
 
     const alias = { // 仅 mp-weixin
@@ -319,4 +320,4 @@ module.exports = {
     webpackConfig.plugins.delete('preload')
     webpackConfig.plugins.delete('prefetch')
   }
-}
+}
diff --git a/packages/webpack-uni-mp-loader/lib/plugin/index-new.js b/packages/webpack-uni-mp-loader/lib/plugin/index-new.js
index ddc26facbe43a2ffd5bb1fcd687aa0efc6c9775f..1859383995a50de53ec3cd16c063976afd941de4 100644
--- a/packages/webpack-uni-mp-loader/lib/plugin/index-new.js
+++ b/packages/webpack-uni-mp-loader/lib/plugin/index-new.js
@@ -76,22 +76,22 @@ function addMPPluginRequire (compilation) {
     const needProcess = process.env.UNI_MP_PLUGIN ? name === UNI_MP_PLUGIN_MAIN : UNI_MP_PLUGIN_EXPORT.includes(name)
     if (needProcess) {
       const modules = compilation.modules
-
+      const orignalSource = compilation.assets[name].source()
+      const globalEnv = process.env.UNI_PLATFORM === 'mp-alipay' ? 'my' : 'wx';
       const filePath = normalizePath(path.resolve(process.env.UNI_INPUT_DIR, name))
-
       const uniModuleId = modules.find(module => module.resource && normalizePath(module.resource) === filePath).id
+      const newlineIndex = orignalSource.lastIndexOf('\n')
 
-      const newlineIndex = compilation.assets[name].source().lastIndexOf('\n')
-
-      const source = compilation.assets[name].source().substring(0, newlineIndex) +
-    `\nmodule.exports = ${process.env.UNI_PLATFORM === 'mp-alipay' ? 'my' : 'wx'}.__webpack_require_${(process.env.UNI_MP_PLUGIN || 'UNI_MP_PLUGIN').replace(/-/g, '_')}__('${uniModuleId}');\n` +
-    compilation.assets[name].source().substring(newlineIndex + 1)
+      const source =
+        orignalSource.substring(0, newlineIndex)
+        + `\nmodule.exports = ${globalEnv}.__webpack_require_UNI_MP_PLUGIN__('${uniModuleId}');\n`
+        + orignalSource.substring(newlineIndex + 1)
 
       compilation.assets[name] = {
-        size () {
+        size() {
           return Buffer.byteLength(source, 'utf8')
         },
-        source () {
+        source() {
           return source
         }
       }