diff --git a/frontend/src/layouts/MainLayout.vue b/frontend/src/layouts/MainLayout.vue
index 3328cec8..bc8b8549 100644
--- a/frontend/src/layouts/MainLayout.vue
+++ b/frontend/src/layouts/MainLayout.vue
@@ -28,7 +28,8 @@
           <span class="page-title">{{ pageTitle }}</span>
         </div>
         <div class="header-right">
-          <el-select v-model="currentEntityId" @change="onEntityChange" size="small" style="width:120px;margin-right:8px;">
+          <!-- 企业切换器：仅多企业用户显示（授权企业≥2时），单企业用户隐藏避免UI噪音 -->
+          <el-select v-if="entities.length >= 2" v-model="currentEntityId" @change="onEntityChange" size="small" style="width:120px;margin-right:8px;">
             <el-option v-for="e in entities" :key="e.id" :label="e.short_name || e.name" :value="e.id" />
           </el-select>
           <el-tag size="small" :type="roleTagType">{{ roleLabel }}</el-tag>