diff --git a/src/views/trials/trials-layout/components/feedBack.vue b/src/views/trials/trials-layout/components/feedBack.vue
index 9e17bca2..c35b81b8 100644
--- a/src/views/trials/trials-layout/components/feedBack.vue
+++ b/src/views/trials/trials-layout/components/feedBack.vue
@@ -1,6 +1,10 @@
 <template>
   <div
-    :class="{ feedBack: true, 'feedBack-in': show, 'feedBack-out': !show }"
+    :class="{
+      feedBack: true,
+      'feedBack-in': show,
+      'feedBack-out': show === false,
+    }"
     @click.stop="open"
   >
     <i class="el-icon-chat-dot-square icon"></i>
@@ -18,7 +22,7 @@ export default {
   data() {
     return {
       visible: false,
-      show: false,
+      show: null,
     };
   },
   mounted() {