diff --git a/backend/src/index.ts b/backend/src/index.ts
index 855d62b..8bc0f05 100644
--- a/backend/src/index.ts
+++ b/backend/src/index.ts
@@ -14,6 +14,7 @@ import { adminRoutes } from './routes/admin';
 // Importing db triggers auto-migration on first load (B-07 fix)
 import { db } from './db/index';
 import { seedAdminUser } from './db/seed-auto';
+import { startScheduler } from './sync/scheduler';
 
 const app = new Hono();
 
@@ -60,6 +61,9 @@ seedAdminUser().catch((err) => {
   console.error('[Seed] Failed to seed admin user:', err);
 });
 
+// 启动自动同步（每天凌晨 2 点 + 启动时首次同步）
+startScheduler();
+
 // Start server
 const port = config.PORT;
 console.info(`DevPerf Dashboard API starting on port ${port}`);
diff --git a/backend/src/sync/scheduler.ts b/backend/src/sync/scheduler.ts
index 13efcc8..45858d2 100644
--- a/backend/src/sync/scheduler.ts
+++ b/backend/src/sync/scheduler.ts
@@ -1,40 +1,25 @@
 import { Cron } from 'croner';
-import { config } from '../config';
-import { syncPlane } from './sync-plane';
 import { syncGitea } from './sync-gitea';
 
-let planeJob: Cron | null = null;
 let giteaJob: Cron | null = null;
 
 export function startScheduler(): void {
-  const planeInterval = config.SYNC_PLANE_INTERVAL;
-  const giteaInterval = config.SYNC_GITEA_INTERVAL;
-
-  // Plane sync every N minutes
-  planeJob = new Cron(`*/${planeInterval} * * * *`, async () => {
-    console.info('[SCHEDULER] Starting Plane sync...');
-    await syncPlane();
-  });
-
-  // Gitea sync every N minutes
-  giteaJob = new Cron(`*/${giteaInterval} * * * *`, async () => {
-    console.info('[SCHEDULER] Starting Gitea sync...');
+  // 每天凌晨 2 点 + 晚上 7 点各同步一次
+  giteaJob = new Cron('0 2,19 * * *', async () => {
+    console.info('[SCHEDULER] Gitea 定时同步开始...');
     await syncGitea();
   });
 
-  console.info(`[SCHEDULER] Plane sync scheduled every ${planeInterval} minutes`);
-  console.info(`[SCHEDULER] Gitea sync scheduled every ${giteaInterval} minutes`);
+  console.info('[SCHEDULER] Gitea 自动同步已启动（每天 02:00 + 19:00）');
 
-  // Run initial sync after 5 seconds
+  // 启动后 10 秒执行一次首次同步
   setTimeout(async () => {
-    console.info('[SCHEDULER] Running initial sync...');
-    await syncPlane().catch(e => console.error('[SCHEDULER] Initial Plane sync failed:', e));
-    await syncGitea().catch(e => console.error('[SCHEDULER] Initial Gitea sync failed:', e));
-  }, 5000);
+    console.info('[SCHEDULER] 执行首次同步...');
+    await syncGitea().catch(e => console.error('[SCHEDULER] 首次同步失败:', e));
+  }, 10000);
 }
 
 export function stopScheduler(): void {
-  planeJob?.stop();
   giteaJob?.stop();
-  console.info('[SCHEDULER] Stopped all sync jobs');
+  console.info('[SCHEDULER] 已停止同步任务');
 }