diff --git a/scripts/query_trades_today.py b/scripts/query_trades_today.py
index 9ae0eb7..d14a52f 100644
--- a/scripts/query_trades_today.py
+++ b/scripts/query_trades_today.py
@@ -24,6 +24,54 @@ if backend.exists():
 BEIJING_TZ = timezone(timedelta(hours=8))
 
 
+def _debug_db(account_id: int, start_ts: int, end_ts: int, time_filter: str, date_label: str):
+    """无结果时输出诊断：DB 概况、查询时间范围、是否有 trades 表 created_at 等"""
+    try:
+        from database.connection import db
+        # 数据库名
+        db_name = getattr(db, "database", "?")
+        print(f"\n[调试] 数据库: {db_name} (来自 DB_NAME 环境变量)")
+        print(f"[调试] 查询时间范围: {start_ts} ~ {end_ts} ({date_label} 00:00 ~ 23:59 北京)")
+        # 该账号总记录数（不限日期）
+        try:
+            r = db.execute_one(
+                "SELECT COUNT(*) as c FROM trades WHERE account_id = %s",
+                (account_id,),
+            )
+            total = r.get("c", 0) if r else 0
+            print(f"[调试] 账号 {account_id} trades 总记录数: {total}")
+        except Exception as e:
+            print(f"[调试] 查询总记录数失败: {e}")
+        # created_at / entry_time 范围
+        try:
+            r = db.execute_one(
+                """SELECT MIN(created_at) as min_c, MAX(created_at) as max_c,
+                          MIN(entry_time) as min_e, MAX(entry_time) as max_e
+                   FROM trades WHERE account_id = %s""",
+                (account_id,),
+            )
+            if r:
+                for k, v in r.items():
+                    if v is not None:
+                        dt = datetime.fromtimestamp(int(v), tz=BEIJING_TZ).strftime("%Y-%m-%d %H:%M:%S")
+                        print(f"[调试] {k}: {v} -> {dt}")
+        except Exception as e:
+            print(f"[调试] 查询时间范围失败(可能无 created_at): {e}")
+        # 按 entry 查当天是否有记录（辅助判断）
+        if time_filter == "created":
+            try:
+                r2 = db.execute_one(
+                    "SELECT COUNT(*) as c FROM trades WHERE account_id = %s AND entry_time >= %s AND entry_time <= %s",
+                    (account_id, start_ts, end_ts),
+                )
+                c2 = r2.get("c", 0) if r2 else 0
+                print(f"[调试] 同一天按 entry_time 筛选: {c2} 条")
+            except Exception:
+                pass
+    except ImportError as e:
+        print(f"[调试] 无法导入 database: {e}")
+
+
 def get_today_range(date_str: str = None):
     """返回当日 00:00 和 23:59:59 的 Unix 时间戳"""
     if date_str:
@@ -46,6 +94,7 @@ def main():
                         help="时间筛选：created=创建时间(落库), entry=入场时间, exit=平仓时间")
     parser.add_argument("--reconciled-only", action="store_true", help="仅可对账记录")
     parser.add_argument("-o", "--output", type=str, help="导出到 JSON 文件")
+    parser.add_argument("--debug", action="store_true", help="无结果时输出诊断信息")
     args = parser.parse_args()
 
     account_id = args.account
@@ -89,6 +138,11 @@ def main():
         out.append(row)
 
     print(f"账号 {account_id} | 日期 {date_label} | 按{args.time_filter} | 共 {len(out)} 条")
+    if len(out) == 0:
+        if args.debug:
+            _debug_db(account_id, start_ts, end_ts, args.time_filter, date_label)
+        else:
+            print("提示: 加 --debug 可查看数据库概况与时间范围，便于排查")
     if args.output:
         with open(args.output, "w", encoding="utf-8") as f:
             json.dump(out, f, ensure_ascii=False, indent=2)