diff --git a/Web/src/assets/style/lib/select.less b/Web/src/assets/style/lib/select.less
index 8e1865f..28419d2 100644
--- a/Web/src/assets/style/lib/select.less
+++ b/Web/src/assets/style/lib/select.less
@@ -1,6 +1,6 @@
 @import (reference) '~@/assets/style/extend.less';
 .ant-select-arrow {
-  .ant-select-arrow-icon {
+  .anticon-down {
     transform: scaleY(.75);
   }
 }
diff --git a/Web/src/pages/system/area/form.vue b/Web/src/pages/system/area/form.vue
index c254096..265fd83 100644
--- a/Web/src/pages/system/area/form.vue
+++ b/Web/src/pages/system/area/form.vue
@@ -12,19 +12,22 @@
         <!-- 表单控件 -->
         <!-- ... -->
         <a-form-model-item label="参数类型" prop="levelType">
-          <a-select :disabled="editDisabled" placeholder="请选择参数类型" v-model="form.levelType">
+          <a-select :disabled="exist" placeholder="请选择参数类型" v-model="form.levelType">
             <a-select-option
               :key="i"
               :value="item.code"
               v-for="(item, i) in levelType"
             >{{ item.value }}</a-select-option>
+            <a-icon slot="suffixIcon" type="lock" v-if="exist" />
           </a-select>
         </a-form-model-item>
         <a-form-model-item label="名称" prop="name">
           <a-input placeholder="请输入区域名称" v-model="form.name" />
         </a-form-model-item>
         <a-form-model-item label="编码" prop="code">
-          <a-input :disabled="exist" placeholder="请输入参数编码" v-model="form.code" />
+          <a-input :disabled="exist" placeholder="请输入参数编码" v-model="form.code">
+            <a-icon slot="suffix" type="lock" v-if="exist" />
+          </a-input>
         </a-form-model-item>
         <a-form-model-item label="区域编码" prop="adCode">
           <a-input placeholder="请输入显示编码" v-model="form.adCode" />
@@ -72,7 +75,6 @@ export default {
       /* ... */
       exist: false,
       levelType: [],
-      editDisabled: false,
     };
   },
 
@@ -90,6 +92,9 @@ export default {
         /* ... */
         levelType: params.record && params.record.levelType.toString(),
       });
+
+      // 编码不可更改
+      this.exist = !!params.record;
     },
 
     /**