diff --git a/apps/ios/EdgeEver/Features/Workspace/MemoEditViewModel.swift b/apps/ios/EdgeEver/Features/Workspace/MemoEditViewModel.swift
index 859115e6..7b4e426e 100644
--- a/apps/ios/EdgeEver/Features/Workspace/MemoEditViewModel.swift
+++ b/apps/ios/EdgeEver/Features/Workspace/MemoEditViewModel.swift
@@ -64,13 +64,16 @@ final class MemoEditViewModel {
             let text = Self.nodeText(block)
                 .split(whereSeparator: { $0.isWhitespace })
                 .joined(separator: " ")
-            if block["type"] as? String == "heading",
-               let attrs = block["attrs"] as? [String: Any],
-               (attrs["level"] as? NSNumber)?.intValue == 1,
-               !text.isEmpty {
-                title = String(text.prefix(160))
-                return
+            if text.isEmpty {
+                let type = block["type"] as? String
+                if type == "paragraph" || type == "heading" { continue }
             }
+            guard block["type"] as? String == "heading",
+                  let attrs = block["attrs"] as? [String: Any],
+                  (attrs["level"] as? NSNumber)?.intValue == 1
+            else { return }
+            title = String(text.prefix(160))
+            return
         }
     }
 
diff --git a/apps/ios/Tests/EdgeEverTests/MemoEditViewModelTests.swift b/apps/ios/Tests/EdgeEverTests/MemoEditViewModelTests.swift
index da77e4ad..8aa1e97e 100644
--- a/apps/ios/Tests/EdgeEverTests/MemoEditViewModelTests.swift
+++ b/apps/ios/Tests/EdgeEverTests/MemoEditViewModelTests.swift
@@ -43,7 +43,7 @@ final class MemoEditViewModelTests: XCTestCase {
         model.beginTitleDerivationSession()
         model.applyEditorPayload(
             markdown: "# Product plan\n\nBody",
-            json: "{\"type\":\"doc\",\"content\":[{\"type\":\"paragraph\",\"content\":[{\"type\":\"text\",\"text\":\"Intro\"}]},{\"type\":\"heading\",\"attrs\":{\"level\":1},\"content\":[{\"type\":\"text\",\"text\":\"Product plan\"}]}]}"
+            json: "{\"type\":\"doc\",\"content\":[{\"type\":\"paragraph\"},{\"type\":\"heading\",\"attrs\":{\"level\":1},\"content\":[{\"type\":\"text\",\"text\":\"Product plan\"}]}]}"
         )
         XCTAssertEqual(model.title, "Product plan")
 
@@ -63,6 +63,16 @@ final class MemoEditViewModelTests: XCTestCase {
         XCTAssertEqual(reopened.title, "Renamed heading")
     }
 
+    func testDoesNotDeriveTitleFromH1AfterBodyContent() {
+        let model = MemoEditViewModel()
+        model.beginTitleDerivationSession()
+        model.applyEditorPayload(
+            markdown: "Intro\n\n# Product plan",
+            json: "{\"type\":\"doc\",\"content\":[{\"type\":\"paragraph\",\"content\":[{\"type\":\"text\",\"text\":\"Intro\"}]},{\"type\":\"heading\",\"attrs\":{\"level\":1},\"content\":[{\"type\":\"text\",\"text\":\"Product plan\"}]}]}"
+        )
+        XCTAssertEqual(model.title, "")
+    }
+
     func testDoesNotDeriveTitleAfterManualTitleEdit() {
         let model = MemoEditViewModel()
         model.beginTitleDerivationSession()
diff --git a/packages/shared/src/content-title.test.mjs b/packages/shared/src/content-title.test.mjs
index 71599cad..14f96112 100644
--- a/packages/shared/src/content-title.test.mjs
+++ b/packages/shared/src/content-title.test.mjs
@@ -6,22 +6,22 @@ describe("deriveMemoTitleFromContent", () => {
     expect(deriveMemoTitleFromContent(markdownToDoc("\n#  Product   plan  \n\nBody"))).toBe("Product plan");
   });
 
-  test("uses the first H1 even when body content comes first", () => {
-    expect(deriveMemoTitleFromContent(markdownToDoc("Intro\n\n# Product plan"))).toBe("Product plan");
+  test("does not use a later H1 when body content comes first", () => {
+    expect(deriveMemoTitleFromContent(markdownToDoc("Intro\n\n# Product plan"))).toBeNull();
   });
 
   test("does not use lower-level headings", () => {
     expect(deriveMemoTitleFromContent(markdownToDoc("## Product plan"))).toBeNull();
   });
 
-  test("uses the first H1 after a non-text block", () => {
+  test("does not skip a meaningful non-text block before the H1", () => {
     expect(deriveMemoTitleFromContent({
       type: "doc",
       content: [
         { type: "image", attrs: { src: "/cover.png" } },
         { type: "heading", attrs: { level: 1 }, content: [{ type: "text", text: "Product plan" }] },
       ],
-    })).toBe("Product plan");
+    })).toBeNull();
   });
 
   test("limits generated titles to the persisted title length", () => {
diff --git a/packages/shared/src/content.ts b/packages/shared/src/content.ts
index a50d6879..2e17730b 100644
--- a/packages/shared/src/content.ts
+++ b/packages/shared/src/content.ts
@@ -77,8 +77,9 @@ const nodeText = (node: unknown): string => {
 };
 
 /**
- * Derives a note title from the first non-empty top-level H1. Callers own the
- * one-shot edit-session policy; this helper only finds the heading text.
+ * Derives a note title only when the first meaningful top-level block is an
+ * H1. Empty text blocks before it are ignored; body content prevents a later
+ * section heading from unexpectedly renaming the note.
  */
 export const deriveMemoTitleFromContent = (doc: unknown): string | null => {
   if (!doc || typeof doc !== "object") return null;
@@ -89,9 +90,12 @@ export const deriveMemoTitleFromContent = (doc: unknown): string | null => {
     if (!value || typeof value !== "object") continue;
     const node = value as { type?: unknown; attrs?: Record<string, unknown> };
     const text = nodeText(node).replace(/\s+/g, " ").trim();
-    if (node.type === "heading" && node.attrs?.level === 1 && text) {
-      return text.slice(0, MEMO_TITLE_MAX_LENGTH);
+    if (!text) {
+      if (node.type === "paragraph" || node.type === "heading") continue;
+      return null;
     }
+    if (node.type !== "heading" || node.attrs?.level !== 1) return null;
+    return text.slice(0, MEMO_TITLE_MAX_LENGTH);
   }
 
   return null;
diff --git a/tests/e2e/new-memo-sync.spec.ts b/tests/e2e/new-memo-sync.spec.ts
index 5093b433..e62c50fd 100644
--- a/tests/e2e/new-memo-sync.spec.ts
+++ b/tests/e2e/new-memo-sync.spec.ts
@@ -177,8 +177,38 @@ const finishSyncAndVerifyReload = async (
 };
 
 test.describe("new memo synchronization", () => {
-  test("derives the empty title from a complete H1 after body paragraphs", async ({ page }) => {
-    const derivedTitle = `后置一级标题 ${Date.now()}`;
+  test("derives the complete title when the first meaningful block is an H1", async ({ page }) => {
+    const derivedTitle = `首个一级标题 ${Date.now()}`;
+    const createResponsePromise = page.waitForResponse(
+      (response) => response.request().method() === "POST" && new URL(response.url()).pathname === "/api/v1/memos",
+    );
+
+    await page.goto("/");
+    await page.getByRole("button", { name: "新建笔记", exact: true }).click();
+    const createResponse = await createResponsePromise;
+    const created = await createResponse.json() as { memo: { id: string } };
+    const editor = page.locator(".ProseMirror[contenteditable='true']");
+
+    try {
+      await editor.click();
+      await page.keyboard.type("# ");
+      await page.keyboard.insertText(derivedTitle);
+
+      await expect(page.getByPlaceholder("无标题")).toHaveValue(derivedTitle);
+      await expect.poll(async () => {
+        const response = await page.request.get(`/api/v1/memos/${created.memo.id}`);
+        if (!response.ok()) return null;
+        const body = await response.json() as { memo: { title: string | null } };
+        return body.memo.title;
+      }).toBe(derivedTitle);
+    } finally {
+      await page.request.delete(`/api/v1/memos/${created.memo.id}`);
+      await page.request.delete(`/api/v1/memos/${created.memo.id}?permanent=1`);
+    }
+  });
+
+  test("does not derive the title from an H1 after body paragraphs", async ({ page }) => {
+    const sectionHeading = `后置一级标题 ${Date.now()}`;
     const createResponsePromise = page.waitForResponse(
       (response) => response.request().method() === "POST" && new URL(response.url()).pathname === "/api/v1/memos",
     );
@@ -197,15 +227,15 @@ test.describe("new memo synchronization", () => {
       await page.keyboard.insertText("第二段正文");
       await page.keyboard.press("Enter");
       await page.keyboard.type("# ");
-      await page.keyboard.insertText(derivedTitle);
+      await page.keyboard.insertText(sectionHeading);
 
-      await expect(titleInput).toHaveValue(derivedTitle);
+      await expect(titleInput).toHaveValue("");
       await expect.poll(async () => {
         const response = await page.request.get(`/api/v1/memos/${created.memo.id}`);
         if (!response.ok()) return null;
         const body = await response.json() as { memo: { title: string | null } };
         return body.memo.title;
-      }).toBe(derivedTitle);
+      }).toBe("无标题笔记");
     } finally {
       await page.request.delete(`/api/v1/memos/${created.memo.id}`);
       await page.request.delete(`/api/v1/memos/${created.memo.id}?permanent=1`);