diff --git a/packages/vue-cli-plugin-uni/lib/app-plus/index.js b/packages/vue-cli-plugin-uni/lib/app-plus/index.js
index 53e7c71162c792b2d8381a8b6f3a3743779edadb..6ada3f814c940e0594a1ffd644e3369038b31a02 100644
--- a/packages/vue-cli-plugin-uni/lib/app-plus/index.js
+++ b/packages/vue-cli-plugin-uni/lib/app-plus/index.js
@@ -22,6 +22,7 @@ const {
 
 const runtimePath = '@dcloudio/uni-mp-weixin/dist/mp.js'
 const wxsPath = '@dcloudio/uni-mp-weixin/dist/wxs.js'
+
 function getProvides (isAppService) {
   if (isAppService) {
     return { // app-service
@@ -44,7 +45,7 @@ function getProvides (isAppService) {
 const v3 = {
   vueConfig: {
     parallel: false,
-    transpileDependencies: [
+    transpileDependencies: [
       wxsPath,
       runtimePath
     ]
@@ -73,7 +74,11 @@ const v3 = {
 
     webpackConfig.optimization.splitChunks = false
 
-    let devtool = false
+    let devtool = false
+
+    if (isAppService && process.env.NODE_ENV !== 'production') {
+      devtool = 'eval-source-map'
+    }
 
     const rules = []