diff --git a/dashboard/src2/pages/NewJsiteDomain.vue b/dashboard/src2/pages/NewJsiteDomain.vue
index 4d68d9d..e01e373 100644
--- a/dashboard/src2/pages/NewJsiteDomain.vue
+++ b/dashboard/src2/pages/NewJsiteDomain.vue
@@ -701,6 +701,16 @@ export default {
        ]
     };
   },
+  watch: {
+    // 监听域名后缀变化，当有域名输入时自动查询
+    selectedSuffix: {
+      handler(newSuffix, oldSuffix) {
+        if (oldSuffix && this.domainName && this.domainName.trim()) {
+          this.checkDomain();
+        }
+      }
+    }
+  },
   computed: {
     fullDomain() {
       if (!this.domainName) return '';