diff --git a/src/views/tunnel-simulate/index.vue b/src/views/tunnel-simulate/index.vue
index 86b4e84..8d63ea7 100644
--- a/src/views/tunnel-simulate/index.vue
+++ b/src/views/tunnel-simulate/index.vue
@@ -363,7 +363,7 @@ const initWebSocket = () => {
           socketData.windSpeed = data;
         }
         nextTick(() => {
-          previewRef.value.changePointValue(item)
+          previewRef.value?.changePointValue(item)
         })
       });
     }