diff --git a/src/components/draw-app/dialogs/SetTrainLink.vue b/src/components/draw-app/dialogs/SetTrainLink.vue
index c1902f7..e1f1e7a 100644
--- a/src/components/draw-app/dialogs/SetTrainLink.vue
+++ b/src/components/draw-app/dialogs/SetTrainLink.vue
@@ -53,7 +53,7 @@ const props = defineProps({
     required: true,
   },
 });
-const connType = ref<number>(0);
+const connType = ref<number | undefined>();
 const connectOptions = ref<{ label: string; value: number }[]>([]);
 
 const showLoadTransData = ref(true);
@@ -85,7 +85,7 @@ function onCreate() {
     updateTrainConn({
       id: props.trainId + '',
       simulationId: props.simulationId,
-      connType: connType.value,
+      connType: connType.value as number,
     })
       .then(() => {
         successNotify('列车连接成功！');