diff --git a/src/i18n.d.ts b/src/i18n.d.ts
index e050b53..b9c76e3 100644
--- a/src/i18n.d.ts
+++ b/src/i18n.d.ts
@@ -3,7 +3,7 @@ export {}
 
 declare module 'vue' {
   interface ComponentCustomProperties {
-    $t: (key: string) => string
-    $tm: (key: string) => [] | { [p: string]: any }
+    $t: (key: string, opt?: Record<string, any>) => string
+    $tm: (key: string, opt?: Record<string, any>) => [] | { [p: string]: any }
   }
 }
diff --git a/src/locale/en.json b/src/locale/en.json
index 9eaddd2..1973f89 100644
--- a/src/locale/en.json
+++ b/src/locale/en.json
@@ -1,3 +1,4 @@
 {
+  "weight": "{heavy}KG",
   "app.name": "En Title"
 }
diff --git a/src/locale/zh-Hans.json b/src/locale/zh-Hans.json
index b1ba111..bd397a1 100644
--- a/src/locale/zh-Hans.json
+++ b/src/locale/zh-Hans.json
@@ -1,3 +1,4 @@
 {
-  "app.name": "中文标题"
+  "app.name": "中文标题",
+  "weight": "{heavy}公斤"
 }
diff --git a/src/pages/demo/page/i18n.vue b/src/pages/demo/page/i18n.vue
index 033cd8d..d81c964 100644
--- a/src/pages/demo/page/i18n.vue
+++ b/src/pages/demo/page/i18n.vue
@@ -11,6 +11,7 @@
   <view class="center flex-col mt-6">
     <view class="text-green-500">多语言测试</view>
     <view class="m-4">{{ $t('app.name') }}</view>
+    <view class="m-4">{{ $t('weight', { heavy: 100 }) }}</view>
 
     <view class="text-green-500 mt-12">切换语言 </view>
     <view class="uni-list">