diff --git a/Changelog.md b/Changelog.md
index 99e39fe0e..6aeff12fc 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -15,6 +15,7 @@
 <summary><strong> ✨ 新增功能 </strong></summary>
 
 - 增加 TrustTunnel, OpenVPN, Tailscale, GostRelay 节点显示支持
+- 全局扩展脚本增加恢复默认按钮、
 
 </details>
 
diff --git a/src/components/profile/editor-viewer.tsx b/src/components/profile/editor-viewer.tsx
index f8d115dde..2b6d61f9b 100644
--- a/src/components/profile/editor-viewer.tsx
+++ b/src/components/profile/editor-viewer.tsx
@@ -3,6 +3,7 @@ import {
   ContentPasteRounded,
   FormatPaintRounded,
   OpenInFullRounded,
+  RestartAltRounded,
 } from '@mui/icons-material'
 import {
   Button,
@@ -41,6 +42,7 @@ export interface EditorViewerProps {
   saveDisabled?: boolean
   onChange?: (value: string) => void
   onSave?: () => void | Promise<void>
+  onResetToDefault?: () => void
   onClose: () => void
   onValidate?: (markers: MonacoMarker[]) => void
 }
@@ -57,6 +59,7 @@ export const EditorViewer = ({
   saveDisabled = false,
   onChange,
   onSave,
+  onResetToDefault,
   onClose,
   onValidate,
 }: EditorViewerProps) => {
@@ -298,6 +301,17 @@ export const EditorViewer = ({
       </DialogContent>
 
       <DialogActions>
+        {!readOnly && onResetToDefault && (
+          <Button
+            onClick={onResetToDefault}
+            variant="outlined"
+            color="warning"
+            startIcon={<RestartAltRounded />}
+            disabled={loading}
+          >
+            {t('shared.actions.resetToDefault')}
+          </Button>
+        )}
         <Button onClick={handleClose} variant="outlined">
           {t(readOnly ? 'shared.actions.close' : 'shared.actions.cancel')}
         </Button>
diff --git a/src/components/profile/profile-more.tsx b/src/components/profile/profile-more.tsx
index e08a8a875..9bdef3ce7 100644
--- a/src/components/profile/profile-more.tsx
+++ b/src/components/profile/profile-more.tsx
@@ -28,6 +28,15 @@ interface Props {
 
 const EMPTY_LOG_INFO: [string, string][] = []
 
+// Default global extend script content (mirrors `ITEM_SCRIPT` in
+// src-tauri/src/utils/tmpl.rs).
+const DEFAULT_SCRIPT = `// Define main function (script entry)
+
+function main(config, profileName) {
+  return config;
+}
+`
+
 // profile enhanced item
 export const ProfileMore = (props: Props) => {
   const { id, logInfo, onSave } = props
@@ -94,6 +103,10 @@ export const ProfileMore = (props: Props) => {
     document.markSaved(currentValue)
   })
 
+  const handleResetToDefault = useCallback(() => {
+    document.setValue(DEFAULT_SCRIPT)
+  }, [document])
+
   return (
     <>
       <ProfileBox
@@ -207,6 +220,7 @@ export const ProfileMore = (props: Props) => {
           dirty={document.dirty}
           onChange={document.setValue}
           onSave={handleSave}
+          onResetToDefault={id === 'Script' ? handleResetToDefault : undefined}
           onClose={() => setFileOpen(false)}
         />
       )}