diff --git a/pages/deepMate/deepMate.vue b/pages/deepMate/deepMate.vue
index d3fab77..3de84b6 100644
--- a/pages/deepMate/deepMate.vue
+++ b/pages/deepMate/deepMate.vue
@@ -220,6 +220,7 @@
       @touchmove="onBackTopTouchMove"
       @touchend="onBackTopTouchEnd"
       @click="onBackTopClick"
+      v-if="messages.length > 0"
     ></image>
 
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