diff --git a/apps/ai-game-creator-shell/src/view/project-development/export/state/xhsMinitoolDownload.ts b/apps/ai-game-creator-shell/src/view/project-development/export/state/xhsMinitoolDownload.ts
index f91bbc09b..6ae5552db 100644
--- a/apps/ai-game-creator-shell/src/view/project-development/export/state/xhsMinitoolDownload.ts
+++ b/apps/ai-game-creator-shell/src/view/project-development/export/state/xhsMinitoolDownload.ts
@@ -7,14 +7,15 @@
 import { save as saveNativeFileDialog } from '@tauri-apps/plugin-dialog';
 
 import { resolveTauriInvoke } from '../../../../app/tauri';
+import { resourceFileNameFromPath } from '../../../../features/resource-canvas/resourceCanvasAssetTransferModel';
 
 /** 返回给用户看的一句话；用户取消对话框时返回空串（不打扰）。 */
 export async function saveXhsMinitoolFileToDisk(input: {
   projectPath: string;
   /** 项目内相对路径，交给宿主的既有门禁复核。 */
   relativePath: string;
-  /** 对话框里的默认文件名。 */
-  defaultFileName: string;
+  /** 路径里取不出文件名时用的兜底名。 */
+  fallbackFileName: string;
   title: string;
 }): Promise<string> {
   const invoke = resolveTauriInvoke();
@@ -22,7 +23,10 @@ export async function saveXhsMinitoolFileToDisk(input: {
   let destination: string | null = null;
   try {
     destination = await saveNativeFileDialog({
-      defaultPath: input.defaultFileName,
+      // 默认文件名取路径最后一段（`/` 与 `\` 都认），取不到就用调用方给的兜底名。
+      defaultPath:
+        resourceFileNameFromPath(input.relativePath.trim()) ||
+        input.fallbackFileName,
       title: input.title,
     });
   } catch (error) {
diff --git a/apps/ai-game-creator-shell/src/view/project-development/export/tabs/xiaohongshu/ArtifactsPane.tsx b/apps/ai-game-creator-shell/src/view/project-development/export/tabs/xiaohongshu/ArtifactsPane.tsx
index 1cd649d8a..f60c33062 100644
--- a/apps/ai-game-creator-shell/src/view/project-development/export/tabs/xiaohongshu/ArtifactsPane.tsx
+++ b/apps/ai-game-creator-shell/src/view/project-development/export/tabs/xiaohongshu/ArtifactsPane.tsx
@@ -34,7 +34,7 @@ export function ArtifactsPane({
     void saveXhsMinitoolFileToDisk({
       projectPath,
       relativePath: form.iconPath.trim(),
-      defaultFileName: fileNameOf(form.iconPath, 'icon.png'),
+      fallbackFileName: 'icon.png',
       title: '保存 icon 文件',
     }).then(setDownloadNotice);
   };
@@ -44,10 +44,7 @@ export function ArtifactsPane({
     void saveXhsMinitoolFileToDisk({
       projectPath,
       relativePath: XHS_MINITOOL_ARTIFACT_RELATIVE_PATH,
-      defaultFileName: fileNameOf(
-        XHS_MINITOOL_ARTIFACT_RELATIVE_PATH,
-        'xhs-minitool.zip',
-      ),
+      fallbackFileName: 'xhs-minitool.zip',
       title: '保存代码 zip',
     }).then(setDownloadNotice);
   };
@@ -162,8 +159,3 @@ function saveHint(minitool: XhsMinitoolExportState): string {
   if (minitool.dirty) return '改动会在停手后自动保存';
   return '';
 }
-
-function fileNameOf(relativePath: string, fallback: string): string {
-  const name = relativePath.trim().split('/').pop();
-  return name ? name : fallback;
-}