diff --git a/packages/vue-cli-plugin-uni/lib/mp.js b/packages/vue-cli-plugin-uni/lib/mp.js
index ac628d7325bb74a8b35fbeb1d96fb8cfbf17f103..c98a18a94180454889c0143228dc2aa28adfb17a 100644
--- a/packages/vue-cli-plugin-uni/lib/mp.js
+++ b/packages/vue-cli-plugin-uni/lib/mp.js
@@ -205,7 +205,9 @@ module.exports = {
           cssnanoOptions: {
             preset: [
               'default',
-              getPlatformCssnano()
+              Object.assign({}, getPlatformCssnano(), {
+                discardComments: true
+              })
             ]
           }