diff --git a/src/views/device/Instance/Detail/Diagnose/index.vue b/src/views/device/Instance/Detail/Diagnose/index.vue
index 01b320f9..fd3a554d 100644
--- a/src/views/device/Instance/Detail/Diagnose/index.vue
+++ b/src/views/device/Instance/Detail/Diagnose/index.vue
@@ -25,6 +25,7 @@
                             />
                             <img
                                 :src="getImage('/diagnose/loading-1.png')"
+                                class="diagnose-loading"
                                 style="height: 100%"
                             />
                         </div>