diff --git a/frontend-web/src/roundtable-planning/components/BusinessChainListDialog.tsx b/frontend-web/src/roundtable-planning/components/BusinessChainListDialog.tsx
index 107d33d7..e34e0ea9 100644
--- a/frontend-web/src/roundtable-planning/components/BusinessChainListDialog.tsx
+++ b/frontend-web/src/roundtable-planning/components/BusinessChainListDialog.tsx
@@ -27,6 +27,7 @@ import {
   DialogHeader,
   DialogTitle,
 } from "@/components/ui/dialog";
+import { isWujieEnv } from "@/core/embed/wujie";
 import { cn } from "@/lib/utils";
 
 import { listChains, setChainPublic, type ChainScope } from "../api/chains";
@@ -187,8 +188,15 @@ export function BusinessChainListDialog({
   onOpenChange,
   onConfigure,
 }: BusinessChainListDialogProps) {
+  const inWujie = isWujieEnv();
   return (
-    <Dialog open={open} onOpenChange={onOpenChange}>
+    <Dialog
+      open={open}
+      onOpenChange={onOpenChange}
+      // Wujie 内部容器场景下，Radix modal 的 body-scroll-lock 可能计算出异常
+      // margin-right，导致右侧出现大片空白。这里降为 non-modal 规避布局抖动。
+      modal={!inWujie}
+    >
       <DialogContent className="flex max-h-[85vh] flex-col gap-0 sm:max-w-2xl">
         <DialogHeader className="shrink-0">
           <DialogTitle className="flex items-center gap-2">