diff --git a/backend/app/api/hold_timing.py b/backend/app/api/hold_timing.py
new file mode 100644
index 0000000..bc6f527
--- /dev/null
+++ b/backend/app/api/hold_timing.py
@@ -0,0 +1,76 @@
+"""交易组持仓周期：目标出场以策略平仓时刻为准；永续先平则以永续平仓为准。"""
+
+from __future__ import annotations
+
+from typing import Any, Mapping, Sequence
+
+# 目标平仓（含 15U / 权利金倍数 / 只平永续）
+_TARGET_REASONS = frozenset({"fixed_usdt", "premium_multiple", "target_perp_only"})
+
+
+def _ts(v: Any) -> int | None:
+    if v is None:
+        return None
+    try:
+        n = int(v)
+    except (TypeError, ValueError):
+        return None
+    return n if n > 0 else None
+
+
+def first_perp_close_ts_ms(fills: Sequence[Mapping[str, Any]]) -> int | None:
+    """永续平仓成交时间（目标只平永续时作为持仓结束时刻）。"""
+    best: int | None = None
+    for f in fills:
+        if str(f.get("leg") or "") != "perp":
+            continue
+        if str(f.get("action") or "") != "close":
+            continue
+        ts = _ts(f.get("ts_ms"))
+        if ts is None:
+            continue
+        if best is None or ts < best:
+            best = ts
+    return best
+
+
+def hold_timing(
+    group: Mapping[str, Any], fills: Sequence[Mapping[str, Any]]
+) -> dict[str, Any]:
+    """
+    返回展示用开仓/平仓/持仓时长。
+
+    - 开仓：groups.open_at_ms
+    - 平仓（策略持仓周期）：
+      - `target_perp_only` / `option_residual`：永续平仓 fill 时间
+      - 其它已平：groups.close_at_ms（缺则回退成交）
+    """
+    open_ms = _ts(group.get("open_at_ms"))
+    status = str(group.get("status") or "")
+    reason = str(group.get("close_reason") or "")
+    group_close = _ts(group.get("close_at_ms"))
+    perp_close = first_perp_close_ts_ms(fills)
+
+    use_perp = reason == "target_perp_only" or status == "option_residual"
+    if use_perp:
+        close_ms = perp_close or group_close
+        basis = "perp"
+    elif status == "open":
+        close_ms = None
+        basis = "open"
+    else:
+        close_ms = group_close
+        if close_ms is None and reason in _TARGET_REASONS:
+            close_ms = perp_close
+        basis = "group"
+
+    hold_ms: int | None = None
+    if open_ms is not None and close_ms is not None and close_ms >= open_ms:
+        hold_ms = close_ms - open_ms
+
+    return {
+        "hold_open_at_ms": open_ms,
+        "hold_close_at_ms": close_ms,
+        "hold_ms": hold_ms,
+        "hold_basis": basis,
+    }
diff --git a/backend/app/api/trades.py b/backend/app/api/trades.py
index 5cab179..bf1d279 100644
--- a/backend/app/api/trades.py
+++ b/backend/app/api/trades.py
@@ -7,6 +7,7 @@ from fastapi import APIRouter, Depends, HTTPException
 from ..models.db import get_db
 from ..sim.pnl import summarize_fills_pnl
 from .auth import require_user
+from .hold_timing import hold_timing
 
 router = APIRouter(prefix="/api/trades", tags=["trades"])
 
@@ -15,6 +16,24 @@ def _row(r: Any) -> dict:
     return dict(r)
 
 
+def _enrich_group(g: dict, fills: list) -> dict:
+    summary = summarize_fills_pnl(fills)
+    # LIVE：优先 groups.realized_pnl（已按交易所回写，含资金费）
+    if str(g.get("exec_mode") or "").upper() == "LIVE" and g.get("realized_pnl") is not None:
+        summary = dict(summary)
+        summary["net_pnl"] = float(g["realized_pnl"])
+        if g.get("funding_usdt") is not None:
+            summary["funding_usdt"] = float(g["funding_usdt"])
+        summary["pnl_source"] = "live_exchange"
+    g["pnl_summary"] = summary
+    if summary.get("net_pnl") is not None:
+        g["net_pnl"] = summary["net_pnl"]
+    elif g.get("realized_pnl") is not None:
+        g["net_pnl"] = float(g["realized_pnl"])
+    g.update(hold_timing(g, fills))
+    return g
+
+
 @router.get("/groups")
 async def list_groups(_user: Annotated[str, Depends(require_user)]) -> dict:
     db = get_db()
@@ -26,20 +45,7 @@ async def list_groups(_user: Annotated[str, Depends(require_user)]) -> dict:
             "SELECT * FROM fills WHERE group_id=? ORDER BY id ASC",
             (g["group_id"],),
         )
-        summary = summarize_fills_pnl(fills)
-        # LIVE：优先 groups.realized_pnl（已按交易所回写，含资金费）
-        if str(g.get("exec_mode") or "").upper() == "LIVE" and g.get("realized_pnl") is not None:
-            summary = dict(summary)
-            summary["net_pnl"] = float(g["realized_pnl"])
-            if g.get("funding_usdt") is not None:
-                summary["funding_usdt"] = float(g["funding_usdt"])
-            summary["pnl_source"] = "live_exchange"
-        g["pnl_summary"] = summary
-        if summary.get("net_pnl") is not None:
-            g["net_pnl"] = summary["net_pnl"]
-        elif g.get("realized_pnl") is not None:
-            g["net_pnl"] = float(g["realized_pnl"])
-        groups.append(g)
+        groups.append(_enrich_group(g, fills))
     return {"groups": groups}
 
 
@@ -54,16 +60,9 @@ async def group_detail(
     fills = db.fetchall(
         "SELECT * FROM fills WHERE group_id=? ORDER BY id ASC", (group_id,)
     )
-    summary = summarize_fills_pnl(fills)
-    gr = _row(g)
-    if str(gr.get("exec_mode") or "").upper() == "LIVE" and gr.get("realized_pnl") is not None:
-        summary = dict(summary)
-        summary["net_pnl"] = float(gr["realized_pnl"])
-        if gr.get("funding_usdt") is not None:
-            summary["funding_usdt"] = float(gr["funding_usdt"])
-        summary["pnl_source"] = "live_exchange"
+    gr = _enrich_group(_row(g), fills)
     return {
         "group": gr,
         "fills": [_row(x) for x in fills],
-        "pnl_summary": summary,
+        "pnl_summary": gr.get("pnl_summary"),
     }
diff --git a/backend/app/live/binance_executor.py b/backend/app/live/binance_executor.py
index d4358dd..85dfda8 100644
--- a/backend/app/live/binance_executor.py
+++ b/backend/app/live/binance_executor.py
@@ -1017,10 +1017,11 @@ class BinanceLiveExecutor(Matcher):
                 ),
             )
             self.db._conn.execute(
-                """UPDATE groups SET status=?, close_reason=?, realized_pnl=?,
+                """UPDATE groups SET status=?, close_at_ms=?, close_reason=?, realized_pnl=?,
                    fees=?, slip_cost=?, note=?, exec_mode=? WHERE group_id=?""",
                 (
                     "option_residual",
+                    now,
                     reason,
                     interim_net,
                     fees,
diff --git a/backend/app/live/executor.py b/backend/app/live/executor.py
index c2a1f94..fc65d16 100644
--- a/backend/app/live/executor.py
+++ b/backend/app/live/executor.py
@@ -1017,10 +1017,11 @@ class OkxLiveExecutor(Matcher):
                 ),
             )
             self.db._conn.execute(
-                """UPDATE groups SET status=?, close_reason=?, realized_pnl=?,
+                """UPDATE groups SET status=?, close_at_ms=?, close_reason=?, realized_pnl=?,
                    fees=?, slip_cost=?, note=?, exec_mode=? WHERE group_id=?""",
                 (
                     "option_residual",
+                    now,
                     reason,
                     interim_net,
                     fees,
diff --git a/backend/app/sim/matcher.py b/backend/app/sim/matcher.py
index 50192cd..ba3a3ae 100644
--- a/backend/app/sim/matcher.py
+++ b/backend/app/sim/matcher.py
@@ -729,10 +729,11 @@ class Matcher:
                 ),
             )
             self.db._conn.execute(
-                """UPDATE groups SET status=?, close_reason=?, realized_pnl=?,
+                """UPDATE groups SET status=?, close_at_ms=?, close_reason=?, realized_pnl=?,
                    fees=?, slip_cost=?, note=? WHERE group_id=?""",
                 (
                     "option_residual",
+                    now,
                     reason,
                     interim_net,
                     fees,
@@ -898,7 +899,8 @@ class Matcher:
                 ),
             )
             self.db._conn.execute(
-                """UPDATE groups SET status=?, close_at_ms=?, realized_pnl=?, fees=?, slip_cost=?
+                """UPDATE groups SET status=?, close_at_ms=COALESCE(close_at_ms, ?),
+                   realized_pnl=?, fees=?, slip_cost=?
                    WHERE group_id=?""",
                 ("closed", now_ms, float(net), fees, slip, group_id),
             )
diff --git a/backend/tests/test_hold_timing.py b/backend/tests/test_hold_timing.py
new file mode 100644
index 0000000..79b9c4d
--- /dev/null
+++ b/backend/tests/test_hold_timing.py
@@ -0,0 +1,63 @@
+"""hold_timing unit tests."""
+
+from backend.app.api.hold_timing import hold_timing
+
+
+def test_hold_target_perp_only_uses_perp_close():
+    g = {
+        "open_at_ms": 1_000,
+        "close_at_ms": 9_000,  # later residual settle would have overwritten
+        "status": "closed",
+        "close_reason": "target_perp_only",
+    }
+    fills = [
+        {"leg": "option", "action": "open", "ts_ms": 1_000},
+        {"leg": "perp", "action": "open", "ts_ms": 1_100},
+        {"leg": "perp", "action": "close", "ts_ms": 5_000},
+        {"leg": "option", "action": "close", "ts_ms": 9_000},
+    ]
+    h = hold_timing(g, fills)
+    assert h["hold_open_at_ms"] == 1_000
+    assert h["hold_close_at_ms"] == 5_000
+    assert h["hold_ms"] == 4_000
+    assert h["hold_basis"] == "perp"
+
+
+def test_hold_option_residual_uses_perp():
+    g = {
+        "open_at_ms": 100,
+        "close_at_ms": 500,
+        "status": "option_residual",
+        "close_reason": "target_perp_only",
+    }
+    fills = [
+        {"leg": "perp", "action": "close", "ts_ms": 500},
+    ]
+    h = hold_timing(g, fills)
+    assert h["hold_close_at_ms"] == 500
+    assert h["hold_ms"] == 400
+
+
+def test_hold_dual_leg_uses_group_close():
+    g = {
+        "open_at_ms": 100,
+        "close_at_ms": 800,
+        "status": "closed",
+        "close_reason": "fixed_usdt",
+    }
+    fills = [
+        {"leg": "option", "action": "close", "ts_ms": 790},
+        {"leg": "perp", "action": "close", "ts_ms": 800},
+    ]
+    h = hold_timing(g, fills)
+    assert h["hold_close_at_ms"] == 800
+    assert h["hold_ms"] == 700
+    assert h["hold_basis"] == "group"
+
+
+def test_hold_open_no_close():
+    g = {"open_at_ms": 100, "close_at_ms": None, "status": "open", "close_reason": None}
+    h = hold_timing(g, [])
+    assert h["hold_close_at_ms"] is None
+    assert h["hold_ms"] is None
+    assert h["hold_basis"] == "open"
diff --git a/docs/更新说明.md b/docs/更新说明.md
index b988ff4..dd9154d 100644
--- a/docs/更新说明.md
+++ b/docs/更新说明.md
@@ -5,6 +5,17 @@
 
 ---
 
+## 2026-07-27 — 交易记录：开仓/平仓时间与持仓周期
+
+### 变更
+
+1. 交易记录列表与明细展示：**开仓时间、平仓时间、持仓周期**（上海时区）。  
+2. **持仓周期按目标平仓计时**：净盈利达标（含默认 15U）出场为准。  
+3. **只平永续 / 期权残留**：平仓时间与周期以**永续平仓**时刻为准，不含期权拖到到期。  
+4. 只平永续时写入 `close_at_ms`；残留期权到期结算不再覆盖该策略平仓时间。
+
+---
+
 ## 2026-07-27 — 安卓竖屏：全屏后系统锁定
 
 ### 变更
diff --git a/frontend/src/pages/Trades.tsx b/frontend/src/pages/Trades.tsx
index f856fbb..7e8fade 100644
--- a/frontend/src/pages/Trades.tsx
+++ b/frontend/src/pages/Trades.tsx
@@ -27,6 +27,10 @@ type Group = {
   close_reason: string | null;
   open_at_ms: number | null;
   close_at_ms: number | null;
+  hold_open_at_ms?: number | null;
+  hold_close_at_ms?: number | null;
+  hold_ms?: number | null;
+  hold_basis?: string | null;
   pnl_summary?: PnlSummary;
 };
 
@@ -50,9 +54,37 @@ function fmt(n: number | null | undefined, digits = 2) {
   return Number(n).toFixed(digits);
 }
 
+/** 上海时区开/平仓时间 */
+function fmtTime(ms: number | null | undefined) {
+  if (ms == null || !Number.isFinite(ms) || ms <= 0) return "—";
+  return new Date(ms).toLocaleString("zh-CN", {
+    timeZone: "Asia/Shanghai",
+    hour12: false,
+    year: "numeric",
+    month: "2-digit",
+    day: "2-digit",
+    hour: "2-digit",
+    minute: "2-digit",
+    second: "2-digit",
+  });
+}
+
+/** 持仓周期：x时y分z秒 */
+function fmtHold(ms: number | null | undefined) {
+  if (ms == null || !Number.isFinite(ms) || ms < 0) return "—";
+  const totalSec = Math.floor(ms / 1000);
+  const h = Math.floor(totalSec / 3600);
+  const m = Math.floor((totalSec % 3600) / 60);
+  const s = totalSec % 60;
+  if (h > 0) return `${h}时${m}分${s}秒`;
+  if (m > 0) return `${m}分${s}秒`;
+  return `${s}秒`;
+}
+
 export default function TradesPage() {
   const [groups, setGroups] = useState<Group[]>([]);
   const [selected, setSelected] = useState<string | null>(null);
+  const [selectedGroup, setSelectedGroup] = useState<Group | null>(null);
   const [fills, setFills] = useState<Fill[]>([]);
   const [summary, setSummary] = useState<PnlSummary | null>(null);
   const [err, setErr] = useState("");
@@ -66,12 +98,16 @@ export default function TradesPage() {
   async function openGroup(id: string) {
     setSelected(id);
     setSummary(null);
+    setSelectedGroup(null);
     try {
-      const r = await apiFetch<{ fills: Fill[]; pnl_summary: PnlSummary }>(
-        `/api/trades/groups/${id}`
-      );
+      const r = await apiFetch<{
+        group: Group;
+        fills: Fill[];
+        pnl_summary: PnlSummary;
+      }>(`/api/trades/groups/${id}`);
       setFills(r.fills);
       setSummary(r.pnl_summary);
+      setSelectedGroup(r.group);
     } catch (e) {
       setErr(e instanceof Error ? e.message : String(e));
     }
@@ -80,6 +116,9 @@ export default function TradesPage() {
   return (
     <div className="trades-page">
       <h2 style={{ marginTop: 0 }}>交易记录</h2>
+      <p className="trade-hold-note">
+        持仓周期按目标平仓计时；净盈利达标且只平永续时，以永续平仓时间为准（不含期权残留至到期）。
+      </p>
       {err ? <div className="err">{err}</div> : null}
       <div className="card trade-list" style={{ marginBottom: 12 }}>
         {groups.length === 0 ? (
@@ -88,6 +127,8 @@ export default function TradesPage() {
           groups.map((g) => {
             const listPnl =
               g.net_pnl ?? g.pnl_summary?.net_pnl ?? g.realized_pnl;
+            const openMs = g.hold_open_at_ms ?? g.open_at_ms;
+            const closeMs = g.hold_close_at_ms ?? g.close_at_ms;
             return (
               <button
                 key={g.group_id}
@@ -101,6 +142,10 @@ export default function TradesPage() {
                     {statusZh(g.status)} ·{" "}
                     {positionSidesZh(g.perp_side, g.option_side)}
                   </span>
+                  <span className="trade-row-times">
+                    开 {fmtTime(openMs)} · 平 {fmtTime(closeMs)} · 周期{" "}
+                    {fmtHold(g.hold_ms)}
+                  </span>
                 </div>
                 <div className={`trade-row-pnl mono ${pnlClass(listPnl)}`}>
                   <span>净盈亏 {fmt(listPnl)}</span>
@@ -118,6 +163,31 @@ export default function TradesPage() {
       {selected ? (
         <div className="card trade-detail">
           <h3 style={{ marginTop: 0 }}>{selected} 成交明细</h3>
+          {selectedGroup ? (
+            <div className="trade-hold-summary">
+              <div className="kv">
+                <span>开仓时间</span>
+                <span className="mono">
+                  {fmtTime(selectedGroup.hold_open_at_ms ?? selectedGroup.open_at_ms)}
+                </span>
+              </div>
+              <div className="kv">
+                <span>平仓时间</span>
+                <span className="mono">
+                  {fmtTime(
+                    selectedGroup.hold_close_at_ms ?? selectedGroup.close_at_ms,
+                  )}
+                  {selectedGroup.hold_basis === "perp" ? (
+                    <span className="trade-hold-basis">（永续）</span>
+                  ) : null}
+                </span>
+              </div>
+              <div className="kv">
+                <span>持仓周期</span>
+                <span className="mono">{fmtHold(selectedGroup.hold_ms)}</span>
+              </div>
+            </div>
+          ) : null}
           <p style={{ color: "var(--muted)", fontSize: 13, marginTop: 0 }}>
             成交价为成交均价（未预先扣费）；手续费单独列出。净盈亏 = 期权盈亏 + 永续盈亏 −
             全部手续费。
diff --git a/frontend/src/styles/app.css b/frontend/src/styles/app.css
index b09d7c5..e277abf 100644
--- a/frontend/src/styles/app.css
+++ b/frontend/src/styles/app.css
@@ -558,6 +558,32 @@ input {
   word-break: break-word;
 }
 
+.trade-row-times {
+  color: var(--muted);
+  font-size: 12px;
+  line-height: 1.4;
+  word-break: break-word;
+}
+
+.trade-hold-note {
+  margin: -4px 0 12px;
+  color: var(--muted);
+  font-size: 13px;
+  line-height: 1.4;
+}
+
+.trade-hold-summary {
+  margin-bottom: 12px;
+  padding-bottom: 8px;
+  border-bottom: 1px solid var(--line);
+}
+
+.trade-hold-basis {
+  margin-left: 6px;
+  color: var(--muted);
+  font-size: 12px;
+}
+
 .trade-row-pnl {
   display: flex;
   flex-direction: column;