diff --git a/sanguo_portfolio/live_reconcile.py b/sanguo_portfolio/live_reconcile.py
index 58f352c..086b636 100644
--- a/sanguo_portfolio/live_reconcile.py
+++ b/sanguo_portfolio/live_reconcile.py
@@ -24,6 +24,7 @@ from __future__ import annotations
 
 import logging
 from datetime import datetime
+from types import SimpleNamespace
 from typing import Any, Dict, Optional
 
 logger = logging.getLogger(__name__)
@@ -206,6 +207,62 @@ def reconcile_pending(engine: Any, ledger: Any, db: str, account_id: int,
     return total
 
 
+# ------------------ 重启兜底:remark 指纹重建本实例订单集 ------------------
+def _own_orders_remarked(engine: Any, account_id: int) -> Dict[str, Any]:
+    """(2026-09-01 002646 事故)按 remark 指纹从 QMT 当日订单行重建本实例订单集。
+
+    engine 订单注册表是**进程内存态**——轮换/崩溃重启后 ``engine.get_orders()``
+    为空,EOD 报「本实例=0」→ 无守恒缺口 → 记日,当日孤儿成交永久失去自动
+    补插(当日 15:05 快照后视图才补全的迟到成交正是这形态)。QMT 当日订单行
+    (``broker.get_orders`` → query_stock_orders)带 remark=``bt:{label}:{hash}``,
+    label=runner_live 注入的 ``live_{account_id}``,跨重启可查——以它为兜底
+    归因源,trades 行自身不带 remark,靠 order_id join 本表。
+
+    仅对注入后提交的订单生效(注入前的历史单 label 六实例共享不可分);
+    ``is_buy`` 缺失的行弃用——方向不明宁可漏归因,不可错归因(错方向入账
+    会反向污染台账)。状态映射复用 broker 自己的 ``_map_order_status``,
+    缺失时保 raw(EOD 守恒只认终态字符串,raw 码只致少计不误计)。
+    """
+    broker = getattr(engine, "broker", None)
+    getter = getattr(broker, "get_orders", None)
+    if not callable(getter):
+        return {}
+    try:
+        rows = getter() or []
+    except Exception as e:  # noqa: BLE001 - 兜底源失败不阻断主 EOD 流程
+        logger.warning("[live-reconcile] remark 重建查 QMT 订单失败: %s", e)
+        return {}
+    prefix = f"bt:live_{account_id}:"
+    mapper = getattr(broker, "_map_order_status", None)
+    out: Dict[str, Any] = {}
+    for row in rows:
+        if not isinstance(row, dict):
+            continue
+        if not str(row.get("order_remark") or "").startswith(prefix):
+            continue
+        oid = str(row.get("order_id") or "")
+        is_buy = row.get("is_buy")
+        security = row.get("security")
+        if not oid or is_buy is None or not security:
+            logger.warning(
+                "[live-reconcile] remark 重建弃用行(方向/代码缺失) order=%s", oid)
+            continue
+        status = row.get("status")
+        if callable(mapper):
+            try:
+                mapped = mapper(status)
+                status = getattr(mapped, "value", mapped)
+            except Exception:  # noqa: BLE001 - 映射失败保 raw
+                pass
+        out[oid] = SimpleNamespace(
+            order_id=oid, _broker_order_id=oid, is_buy=bool(is_buy),
+            amount=int(row.get("amount") or 0),
+            filled=int(row.get("filled") or 0),
+            status=status, security=str(security), add_time=None,
+        )
+    return out
+
+
 # ------------------ b 宽修:EOD 对账回填 ------------------
 def eod_reconcile(engine: Any, ledger: Any, db: str, account_id: int,
                   strategy_name: str) -> Dict[str, int]:
@@ -230,6 +287,10 @@ def eod_reconcile(engine: Any, ledger: Any, db: str, account_id: int,
         boid = getattr(o, "_broker_order_id", None)
         if boid:
             own_by_broker[str(boid)] = o
+    # 重启兜底:engine 订单表是进程态,缺的按 remark 指纹从 QMT 当日订单补
+    # (engine 自己的单信息更全,优先;setdefault 只填洞)
+    for oid, shim in _own_orders_remarked(engine, account_id).items():
+        own_by_broker.setdefault(oid, shim)
     broker = getattr(engine, "broker", None)
     trades_all = []
     getter = getattr(broker, "get_trades", None)
diff --git a/sanguo_portfolio/runner_live.py b/sanguo_portfolio/runner_live.py
index b74bafc..1d227e9 100644
--- a/sanguo_portfolio/runner_live.py
+++ b/sanguo_portfolio/runner_live.py
@@ -294,9 +294,17 @@ def run_live(provider_config: Dict[str, Any] | None = None) -> None:
         _instance_adapter(cfg["account_id"]),
         broker_factory=lambda: broker,
         # bullet_trade 每实例锁 runtime 目录(单实例设计);多实盘并行须各用独立目录
-        live_config={"runtime_dir": str(
-            Path(__file__).resolve().parent.parent / "runtime"
-            / f"live_{cfg['account_id'] or 'solo'}")},
+        # strategy_name=实例唯一 remark label(2026-09-01 002646 事故:六实例适配
+        # 文件同名 live_strategy.py → 订单 remark label 全为 "live_strateg" 跨实
+        # 例不可分;EOD 对账重启后按 remark=bt:live_{id}: 重建本实例订单集,
+        # 引擎订单表是进程态,只有 remark 跨重启可归因)。仅对注入后新单生效。
+        live_config={
+            "runtime_dir": str(
+                Path(__file__).resolve().parent.parent / "runtime"
+                / f"live_{cfg['account_id'] or 'solo'}"),
+            **({"strategy_name": f"live_{cfg['account_id']}"}
+               if cfg["account_id"] else {}),
+        },
     )
     logger.info(
         "组合 live engine 启动: strategy=%s max_pool=%s benchmark=%s cash=%s",
diff --git a/tests/portfolio/test_live_reconcile.py b/tests/portfolio/test_live_reconcile.py
index fad516f..2de0bc8 100644
--- a/tests/portfolio/test_live_reconcile.py
+++ b/tests/portfolio/test_live_reconcile.py
@@ -558,3 +558,89 @@ class TestLedgerSeenIds:
         assert snap == {"t1"}
         snap.add("t2")  # 副本可改,不污染账本
         assert led.seen_trade_ids() == {"t1"}
+
+
+# ------------------ 重启兜底:remark 指纹重建(2026-09-01 002646 事故) ------------------
+def _qmt_order_row(order_id="1090", remark="bt:live_19:ab12cd34",
+                   security="600276.XSHG", amount=600, filled=600,
+                   status=56, is_buy=True):
+    """贴 QmtBroker.sync_orders 行键(状态为 raw 码,56=全部成交)。"""
+    return {"order_id": order_id, "security": security, "amount": amount,
+            "filled": filled, "status": status, "is_buy": is_buy,
+            "order_remark": remark}
+
+
+def _restarted_engine(qmt_orders, qmt_trades):
+    """重启后的 engine 替身:订单注册表为空(进程态已失),broker 行为贴
+    QmtBroker(get_orders 带 remark + _map_order_status 归一)。"""
+    broker = SimpleNamespace(
+        get_orders=lambda: list(qmt_orders),
+        get_trades=lambda: list(qmt_trades),
+        _map_order_status=lambda raw: SimpleNamespace(
+            value="filled" if raw == 56 else f"raw_{raw}"),
+    )
+    return SimpleNamespace(get_orders=lambda: {}, broker=broker)
+
+
+class TestRemarkRebuildAfterRestart:
+    """002646 形态:轮换杀进程 → QMT 视图 18:48-19:15 才补全迟到成交 →
+    新进程 EOD「本实例=0」记日,孤儿成交永久失联。remark 指纹重建 own 集
+    后,重启照样能归因/补插/守恒。"""
+
+    def test_backfill_via_remark_after_restart(self, db):
+        """engine 订单空 + QMT 订单 remark=本实例 → 迟到成交照常补插+守恒平。"""
+        led = LiveInstanceLedger(initial_cash=1_000_000)
+        eng = _restarted_engine(
+            [_qmt_order_row(order_id="1090", amount=600, filled=600)],
+            [_qmt_trade(order_id="1090", security="600276.XSHG",
+                        amount=600, price=7.0, trade_id="99016")])
+        summary = eod_reconcile(eng, led, db, 19, "s")
+        assert summary["ours"] == 1          # remark 重建归因成功
+        assert summary["backfilled"] == 1    # 002646 那笔 600 股补回来
+        assert summary["conservation_gaps"] == []
+        rows = live_reconcile_eod_rows(db, 19)
+        assert rows and rows[-1]["volume"] == 600
+
+    def test_other_instance_remark_not_attributed(self, db):
+        """别家实例的 remark 前缀(live_18)不归因给 live_19。"""
+        led = LiveInstanceLedger(initial_cash=1_000_000)
+        eng = _restarted_engine(
+            [_qmt_order_row(order_id="1080", remark="bt:live_18:ffff1111")],
+            [_qmt_trade(order_id="1080", security="600276.XSHG",
+                        amount=600, price=7.0, trade_id="99017")])
+        summary = eod_reconcile(eng, led, db, 19, "s")
+        assert summary["ours"] == 0
+        assert summary["backfilled"] == 0
+        assert summary["foreign"] == 1
+
+    def test_row_without_side_excluded(self, db, caplog):
+        """is_buy 缺失的 remark 行弃用——方向不明宁可漏归因不可错归因。"""
+        led = LiveInstanceLedger(initial_cash=1_000_000)
+        row = _qmt_order_row(order_id="1091")
+        row["is_buy"] = None
+        eng = _restarted_engine(
+            [row],
+            [_qmt_trade(order_id="1091", security="600276.XSHG",
+                        amount=100, price=7.0, trade_id="99018")])
+        with caplog.at_level("WARNING"):
+            summary = eod_reconcile(eng, led, db, 19, "s")
+        assert summary["backfilled"] == 0
+        assert any("方向" in r.message or "弃用" in r.message
+                   for r in caplog.records)
+
+    def test_sell_direction_propagates(self, db):
+        """卖出方向的 remark 重建单,补插行 direction=sell(错方向入账=反向污染)。"""
+        led = LiveInstanceLedger(initial_cash=1_000_000)
+        eng = _restarted_engine(
+            [_qmt_order_row(order_id="1092", is_buy=False)],
+            [_qmt_trade(order_id="1092", security="600276.XSHG",
+                        amount=600, price=7.0, trade_id="99019")])
+        summary = eod_reconcile(eng, led, db, 19, "s")
+        assert summary["backfilled"] == 1
+        rows = live_reconcile_eod_rows(db, 19)
+        assert rows[-1]["direction"] == "sell"
+
+
+def live_reconcile_eod_rows(db, account_id):
+    from sanguo_live.persistence import list_trades
+    return list_trades(db, account_id)
diff --git a/tests/portfolio/test_runner_live_connect_retry.py b/tests/portfolio/test_runner_live_connect_retry.py
index 0d74a97..986042d 100644
--- a/tests/portfolio/test_runner_live_connect_retry.py
+++ b/tests/portfolio/test_runner_live_connect_retry.py
@@ -56,3 +56,13 @@ def test_backoff_sleep_invoked_per_failure():
     with_connect_retry(b, attempts=5, wait_sec=7.0, _sleep=slept.append)
     b.connect()
     assert slept == [7.0, 7.0]  # 每次失败后睡一次
+
+
+def test_live_config_carries_instance_strategy_name():
+    """(2026-09-01 002646)runner_live 经 live_config 注入 strategy_name=
+    live_{id},使 bullet_trade 订单 remark label(bt:live_17:…)实例唯一——
+    EOD 对账重启兜底归因(live_reconcile._own_orders_remarked)的前提。
+    钉住 LiveConfig.load 吃这个键的 seam,上游升级若丢它必红。"""
+    from bullet_trade.core.live_engine import LiveConfig
+    cfg = LiveConfig.load({"strategy_name": "live_17"})
+    assert cfg.strategy_name == "live_17"