diff --git a/sanguo_portfolio/live_reconcile.py b/sanguo_portfolio/live_reconcile.py
index 66dccdf..bddf56b 100644
--- a/sanguo_portfolio/live_reconcile.py
+++ b/sanguo_portfolio/live_reconcile.py
@@ -284,11 +284,15 @@ def eod_reconcile(engine: Any, ledger: Any, db: str, account_id: int,
             ledger_vol[vkey] = ledger_vol.get(vkey, 0) + int(r.get("amount") or 0)
 
     # 守恒校验:订单成交合计 vs 台账记录合计(前缀 6 位码归一,跨日订单不计)
+    # ⚠️ 订单时间字段=bullet_trade Order.add_time(08-31 修:原误读不存在的
+    # ``datetime`` 属性恒 None → 跨日过滤从不生效,引擎跨交易日存活时历史
+    # 订单全进对比 → 每日假缺口告警;测试替身当时被喂了 datetime= 字段,
+    # 把 bug 行为锁进了断言——替身必须贴真实字段名)
     order_vol: Dict[tuple, int] = {}
     for o in own_by_broker.values():
         if _status_str(getattr(o, "status", None)) not in _TERMINAL:
             continue
-        o_dt = getattr(o, "datetime", None)
+        o_dt = getattr(o, "add_time", None)
         if o_dt is not None and not str(o_dt).startswith(today):
             continue
         filled = int(getattr(o, "filled", 0) or 0)
@@ -313,7 +317,7 @@ def eod_reconcile(engine: Any, ledger: Any, db: str, account_id: int,
     for o in own_by_broker.values():
         if _status_str(getattr(o, "status", None)) not in ("rejected", "failed", "error"):
             continue
-        o_dt = getattr(o, "datetime", None)
+        o_dt = getattr(o, "add_time", None)
         if o_dt is not None and not str(o_dt).startswith(today):
             continue
         if int(getattr(o, "filled", 0) or 0) > 0:
diff --git a/tests/portfolio/test_live_reconcile.py b/tests/portfolio/test_live_reconcile.py
index 5c97acd..ae33479 100644
--- a/tests/portfolio/test_live_reconcile.py
+++ b/tests/portfolio/test_live_reconcile.py
@@ -26,11 +26,13 @@ from sanguo_portfolio.live_reconcile import (
 
 # ------------------ 公共替身 ------------------
 def _order(oid="o1", broker_oid="1001", security="000049.XSHE", is_buy=True,
-           amount=500, filled=0, status="open", datetime_=None):
+           amount=500, filled=0, status="open", add_time_=None):
+    """替身字段名必须贴真实 bullet_trade Order(08-31 教训:曾被喂不存在的
+    ``datetime``=,把守恒跨日过滤的属性错位 bug 锁进了断言)。"""
     return SimpleNamespace(
         order_id=oid, _broker_order_id=broker_oid, security=security,
         is_buy=is_buy, amount=amount, filled=filled, status=status,
-        datetime=datetime_,
+        add_time=add_time_,
     )
 
 
@@ -361,13 +363,30 @@ class TestEodReconcile:
         eng = _engine(
             [_order(status="rejected", filled=300, amount=500, broker_oid="a"),
              _order(status="rejected", filled=0, amount=200, broker_oid="b",
-                    datetime_="2020-01-01 10:00:00")],
+                    add_time_="2020-01-01 10:00:00")],
             [])
         with caplog.at_level("WARNING"):
             summary = eod_reconcile(eng, led, db, 19, "s")
         assert summary["rejected_orders"] == []
         assert not any("废单" in r.message for r in caplog.records)
 
+    def test_yesterday_order_no_conservation_gap(self, db, caplog):
+        """08-31 守恒误报回归:引擎跨交易日存活(进程不死)时,**昨日**的
+        终态足额订单不得进当日守恒对比——台账只记当日行,历史订单计入
+        必然产生假缺口(原 ``datetime`` 属性误读恒 None,过滤从不生效)。"""
+        led = LiveInstanceLedger(initial_cash=1_000_000)
+        from datetime import timedelta as _td
+        yday = (datetime.now() - _td(days=1)).strftime("%Y-%m-%d 09:30:00")
+        eng = _engine(
+            [_order(status="filled", filled=500, broker_oid="old",
+                    add_time_=yday),
+             _order(status="filled", filled=500, broker_oid="new")],
+            [_qmt_trade(order_id="new", trade_id="t-new")])
+        with caplog.at_level("WARNING"):
+            summary = eod_reconcile(eng, led, db, 19, "s")
+        assert summary["conservation_gaps"] == []
+        assert summary["rejected_orders"] == []
+
     def test_gap_warning_dedup_on_identical_retry(self, db, caplog):
         """缺口重试轮:内容不变只首轮回 WARNING,重复轮降级 INFO 防刷屏。"""
         from sanguo_live.persistence import save_trade