diff --git a/src/main/index.ts b/src/main/index.ts
index 00f71f1..bfa11e6 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -129,14 +129,23 @@ function registerIpc(): void {
   });
   ipcMain.handle("flows:get", (_event, id: string) => getFlow(id));
   ipcMain.handle("flows:save", (_event, flow: FlowDefinition, opts?: FlowSaveOptions): FlowSaveResult => {
-  if (!opts?.force && opts?.expectedUpdatedAt) {
-    const disk = getFlow(flow.id);
-    if (disk && disk.meta?.updatedAt && disk.meta.updatedAt !== opts.expectedUpdatedAt) {
-      return { conflict: true, diskFlow: disk };
+    if (!opts?.force && opts?.expectedUpdatedAt) {
+      let disk: FlowDefinition | null = null;
+      try {
+        disk = getFlow(flow.id);
+      } catch {
+        disk = null; // 磁盘文件不存在或损坏时视为全新保存
+      }
+      if (disk && disk.meta?.updatedAt && disk.meta.updatedAt !== opts.expectedUpdatedAt) {
+        // 内容一致（仅 updatedAt 差异，如并发/重复保存）不视为冲突
+        const normalize = (item: FlowDefinition) => JSON.stringify({ ...item, meta: undefined });
+        if (normalize(disk) !== normalize(flow)) {
+          return { conflict: true, diskFlow: disk };
+        }
+      }
     }
-  }
-  return { conflict: false, flow: saveFlow(flow) };
-});
+    return { conflict: false, flow: saveFlow(flow) };
+  });
   ipcMain.handle("flows:delete", (_event, id: string) => {
     deleteFlow(id);
     return true;
diff --git a/src/renderer/src/pages/EditorPage.tsx b/src/renderer/src/pages/EditorPage.tsx
index f3b2c8e..d1373f6 100644
--- a/src/renderer/src/pages/EditorPage.tsx
+++ b/src/renderer/src/pages/EditorPage.tsx
@@ -1,4 +1,4 @@
-import { useCallback, useEffect, useState } from "react";
+import { useCallback, useEffect, useRef, useState } from "react";
 import { ArrowLeft, Check, CircleAlert, CirclePlay, Lightbulb, Loader2, Redo2, Save, Square, Undo2, X } from "lucide-react";
 import type { Catalog } from "@shared/types";
 import { useEditorStore } from "../store/editorStore";
@@ -34,6 +34,9 @@ export function EditorPage({ catalog, onToast, onBack }: EditorPageProps) {
   const startRun = useRunStore((state) => state.start);
   const stopRun = useRunStore((state) => state.stop);
   const [saving, setSaving] = useState(false);
+  // 同步锁：防止自动保存定时器与按钮点击（或双击）在同一帧内触发两次并发保存，
+  // 并发保存会让后到者误判磁盘版本冲突（saving state 异步更新拦不住同一帧的第二次调用）
+  const savingRef = useRef(false);
   const [saveConflict, setSaveConflict] = useState(false);
   const [savedAt, setSavedAt] = useState<string | null>(null);
   const [validationIssues, setValidationIssues] = useState<FlowValidationIssue[] | null>(null);
@@ -57,7 +60,8 @@ export function EditorPage({ catalog, onToast, onBack }: EditorPageProps) {
 
   const save = useCallback(async (opts?: { interactive?: boolean }) => {
     const current = useEditorStore.getState().flow;
-    if (!current || saving) return null;
+    if (!current || savingRef.current) return null;
+    savingRef.current = true;
     setSaving(true);
     try {
       const result = await window.rpa.flows.save(current, {
@@ -99,9 +103,10 @@ export function EditorPage({ catalog, onToast, onBack }: EditorPageProps) {
       onToast(error instanceof Error ? error.message : String(error), "error");
       return null;
     } finally {
+      savingRef.current = false;
       setSaving(false);
     }
-  }, [loadFlow, markSaved, onToast, saving, syncSavedFlow]);
+  }, [loadFlow, markSaved, onToast, syncSavedFlow]);
 
   useEffect(() => {
     if (!dirty || saveConflict) return;