diff --git a/src/views/oneMap/components/ZTGL.vue b/src/views/oneMap/components/ZTGL.vue
index 796f6da..73cecf7 100644
--- a/src/views/oneMap/components/ZTGL.vue
+++ b/src/views/oneMap/components/ZTGL.vue
@@ -67,8 +67,10 @@
   }, 100);
 });
 onBeforeUnmount(() => {
-  newfiberMapbox.removeLayer(newfiberMapbox.getLayerByName('testProjection'));
-  mapBoxVectorLayer.removeByIds(['testProjection']);
+  if (newfiberMapbox.getLayerByName('testProjection')) {
+    newfiberMapbox.removeLayer(newfiberMapbox.getLayerByName('testProjection'));
+    mapBoxVectorLayer.removeByIds(['testProjection']);
+  }
 });
 </script>