diff --git a/packages/vue-cli-plugin-uni/packages/vue-loader/lib/runtime/componentNormalizer.js b/packages/vue-cli-plugin-uni/packages/vue-loader/lib/runtime/componentNormalizer.js
index 5985bc6af062721c78b2f9e9fbceddd604d8e6f2..425a03e67dbf76325da0f28775b092a4d115266a 100644
--- a/packages/vue-cli-plugin-uni/packages/vue-loader/lib/runtime/componentNormalizer.js
+++ b/packages/vue-cli-plugin-uni/packages/vue-loader/lib/runtime/componentNormalizer.js
@@ -23,7 +23,15 @@ export default function normalizeComponent (
 
   // fixed by xxxxxx auto components
   if (components) {
-    options.components = Object.assign(components, options.components || {})
+    if (!options.components) {
+      options.components = {}
+    }
+    var hasOwn = Object.prototype.hasOwnProperty
+    for (var name in components) {
+      if (hasOwn.call(components, name) && !hasOwn.call(options.components, name)) {
+        options.components[name] = components[name]
+      }
+    }
   }
   // fixed by xxxxxx renderjs
   if (renderjs) {