diff --git a/src/views/trials/trials-layout/components/trialsNavbar.vue b/src/views/trials/trials-layout/components/trialsNavbar.vue
index c91235da..082a8545 100644
--- a/src/views/trials/trials-layout/components/trialsNavbar.vue
+++ b/src/views/trials/trials-layout/components/trialsNavbar.vue
@@ -50,7 +50,8 @@
           <el-menu-item index="4-3">{{ $t('trials:trials-myinfo:button:loginout') }}</el-menu-item>
         </el-submenu>
       </el-menu>
-      <TopLang />
+      <TopLang v-if="VUE_APP_OSS_CONFIG_REGION !== 'oss-us-west-1'"/>
+      
     </div>
   </div>
 </template>
@@ -66,7 +67,8 @@ export default {
       activeIndex: '2',
       isReviewer: false,
       userTypeShortName: zzSessionStorage.getItem('userTypeShortName'),
-      notice: ''
+      notice: '',
+      VUE_APP_OSS_CONFIG_REGION: process.env.VUE_APP_OSS_CONFIG_REGION
     }
   },
   computed: {