diff --git a/packages/vue-cli-plugin-uni/lib/env.js b/packages/vue-cli-plugin-uni/lib/env.js
index 3f3eb023f44086f9f69607058681850d626d624f..da18039a186a334f3abdb208c96ba9e9bbb65b9b 100644
--- a/packages/vue-cli-plugin-uni/lib/env.js
+++ b/packages/vue-cli-plugin-uni/lib/env.js
@@ -83,14 +83,15 @@ if (
 const defaultOutputDir = '../../../../dist/' +
   (process.env.NODE_ENV === 'production' ? 'build' : 'dev') + '/' +
   (process.env.UNI_SUB_PLATFORM || process.env.UNI_PLATFORM)
-
+
+process.env.UNI_OUTPUT_DEFAULT_DIR = path.resolve(__dirname, defaultOutputDir)
 if (process.env.UNI_OUTPUT_DIR && process.env.UNI_OUTPUT_DIR.indexOf('./') === 0) {
   process.env.UNI_OUTPUT_DIR = path.resolve(process.cwd(), process.env.UNI_OUTPUT_DIR)
 }
 
 process.env.UNI_PLATFORM = process.env.UNI_PLATFORM || 'h5'
 process.env.VUE_APP_PLATFORM = process.env.UNI_PLATFORM
-process.env.UNI_OUTPUT_DIR = process.env.UNI_OUTPUT_DIR || path.resolve(__dirname, defaultOutputDir)
+process.env.UNI_OUTPUT_DIR = process.env.UNI_OUTPUT_DIR || process.env.UNI_OUTPUT_DEFAULT_DIR
 
 if (process.env.UNI_PLATFORM === 'app-plus') {
   process.env.UNI_OUTPUT_TMP_DIR = path.resolve(process.env.UNI_OUTPUT_DIR, '../.tmp/app-plus')
diff --git a/packages/vue-cli-plugin-uni/lib/mp/index.js b/packages/vue-cli-plugin-uni/lib/mp/index.js
index 5ef4cced2b18295238bd053a79ba64380e30132d..a1ac93d969020f1ad948ab717de5005a893ec003 100644
--- a/packages/vue-cli-plugin-uni/lib/mp/index.js
+++ b/packages/vue-cli-plugin-uni/lib/mp/index.js
@@ -121,7 +121,9 @@ class PreprocessAssetsPlugin {
 }
 
 function initSubpackageConfig (webpackConfig, vueOptions) {
-  process.env.UNI_OUTPUT_DIR = path.resolve(process.env.UNI_OUTPUT_DIR, process.env.UNI_SUBPACKGE)
+  if (process.env.UNI_OUTPUT_DEFAULT_DIR === process.env.UNI_OUTPUT_DIR) { // 未自定义output
+    process.env.UNI_OUTPUT_DIR = path.resolve(process.env.UNI_OUTPUT_DIR, process.env.UNI_SUBPACKGE)
+  }
   vueOptions.outputDir = process.env.UNI_OUTPUT_DIR
   webpackConfig.output.path(process.env.UNI_OUTPUT_DIR)
   webpackConfig.output.jsonpFunction('webpackJsonp_' + process.env.UNI_SUBPACKGE)