diff --git a/scripts/preflight_verify.py b/scripts/preflight_verify.py
index 0fdbe001..9d47a324 100644
--- a/scripts/preflight_verify.py
+++ b/scripts/preflight_verify.py
@@ -143,6 +143,21 @@ def check_cron_timestamps():
             pass
     check("cron过期检查", stale_count == 0, f"{stale_count}个cron长时间未正常运行" if stale_count else "")
 
+# ── 6. DB死锁检测 ──
+def check_db_locks():
+    """检查最近24小时是否有 database is locked 错误"""
+    try:
+        import subprocess
+        r = subprocess.run(
+            ["sudo", "journalctl", "-u", "xmpp-zhiwei", "--since", "24 hours ago", "--no-pager"],
+            capture_output=True, text=True, timeout=30
+        )
+        locked_lines = [l for l in r.stdout.split("\n") if "database is locked" in l.lower()]
+        check("DB死锁: 24h内lock错误", len(locked_lines) == 0,
+              f"发现{len(locked_lines)}次: {locked_lines[0][:120]}" if locked_lines else "")
+    except Exception as e:
+        check("DB死锁检查", False, str(e))
+
 if __name__ == "__main__":
     print("🔍 MoFin 开盘前验证", datetime.now().strftime("%m-%d %H:%M"))
     print("=" * 40)
@@ -150,6 +165,8 @@ if __name__ == "__main__":
     check_imports()
     check_db()
     check_smoke()
+    check_cron_timestamps()
+    check_db_locks()
     
     # 汇总
     print()