diff --git a/src/renderer/plugins/markdown-mind-map.ts b/src/renderer/plugins/markdown-mind-map.ts
index 07b03493..3fb14f4e 100644
--- a/src/renderer/plugins/markdown-mind-map.ts
+++ b/src/renderer/plugins/markdown-mind-map.ts
@@ -124,15 +124,17 @@ const init = (ele: HTMLElement) => {
       link.click()
     }
 
+    const filename = `mindmap-${Date.now()}.${type}`
+
     switch (type) {
       case 'svg':
-        download('data:image/svg+xml;base64,' + strToBase64(await km.exportData('svg')), 'mindmap.svg')
+        download('data:image/svg+xml;base64,' + strToBase64(await km.exportData('svg')), filename)
         break
       case 'km':
-        download('data:application/octet-stream;base64,' + strToBase64(await km.exportData('json')), 'mindmap.km')
+        download('data:application/octet-stream;base64,' + strToBase64(await km.exportData('json')), filename)
         break
       case 'png':
-        download(await km.exportData('png'), 'mindmap.png')
+        download(await km.exportData('png'), filename)
         break
       default:
         break