diff --git a/web/src/components/business/NodeSwitcher.tsx b/web/src/components/business/NodeSwitcher.tsx
index 781993d..6a820eb 100644
--- a/web/src/components/business/NodeSwitcher.tsx
+++ b/web/src/components/business/NodeSwitcher.tsx
@@ -26,6 +26,9 @@ export function NodeSwitcher() {
     setSelected(activeInterconnectNodeId || 'local')
   }, [])
 
+  // SSR 时返回 null，避免 hydration 错误
+  if (!mounted) return null
+
   const fetchNodes = useCallback(async () => {
     try {
       const res = await getNodes()