diff --git a/packages/vue-cli-plugin-uni/lib/format-log.js b/packages/vue-cli-plugin-uni/lib/format-log.js
index b34bf74c2fdc89af7b5e81eba81e6576ee7077c2..fb6017e8e945b8617b0dfa2ab4f55676cbc06466 100644
--- a/packages/vue-cli-plugin-uni/lib/format-log.js
+++ b/packages/vue-cli-plugin-uni/lib/format-log.js
@@ -19,9 +19,9 @@ export default function formatLog () {
   }
 
   var msgs = args.map(function (v) {
-    var type = Object.prototype.toString.call(v)
+    var type = Object.prototype.toString.call(v).toLowerCase()
 
-    if (type.toLowerCase() === '[object object]') {
+    if (type === '[object object]' || type === '[object array]') {
       try {
         v = '---BEGIN:JSON---' + JSON.stringify(v) + '---END:JSON---'
       } catch (e) {