diff --git a/orders/models.py b/orders/models.py
index 17c1101..6b2d1cb 100644
--- a/orders/models.py
+++ b/orders/models.py
@@ -1291,13 +1291,13 @@ class TodayOrderFake(QModel):
 
 
 class TodayOrderShowConfig(QModel):
-    """俱乐部「今日订单」真假混合与随机批规则。"""
+    """俱乐部「今日订单」真假混合：按间隔累加假单数（不整批重抽）。"""
 
     id = models.BigAutoField(primary_key=True)
     club_id = models.CharField(max_length=16, unique=True, db_index=True)
     mix_enabled = models.BooleanField(default=False, verbose_name='真假混合')
-    batch_size = models.PositiveIntegerField(default=5, verbose_name='每批随机假单数')
-    interval_seconds = models.PositiveIntegerField(default=120, verbose_name='换批间隔秒')
+    batch_size = models.PositiveIntegerField(default=5, verbose_name='每间隔累加假单数')
+    interval_seconds = models.PositiveIntegerField(default=120, verbose_name='累加间隔秒')
     CreateTime = models.DateTimeField(auto_now_add=True)
     UpdateTime = models.DateTimeField(auto_now=True)
 
@@ -1306,12 +1306,16 @@ class TodayOrderShowConfig(QModel):
 
 
 class TodayOrderFakeBatchState(QModel):
-    """当前展示中的假单批次（按俱乐部）。"""
+    """
+    当日假单累加状态（按俱乐部一行，不记历史日）：
+    - fake_ids：已展示假单主键（只增不换）
+    - last_shuffle_at：上次累加时间（跨日则重置）
+    """
 
     id = models.BigAutoField(primary_key=True)
     club_id = models.CharField(max_length=16, unique=True, db_index=True)
-    last_shuffle_at = models.DateTimeField(null=True, blank=True)
-    fake_ids = models.JSONField(default=list, blank=True, verbose_name='当前批次假单主键列表')
+    last_shuffle_at = models.DateTimeField(null=True, blank=True, verbose_name='上次累加时间')
+    fake_ids = models.JSONField(default=list, blank=True, verbose_name='已展示假单主键列表')
     UpdateTime = models.DateTimeField(auto_now=True)
 
     class Meta:
diff --git a/orders/services/today_orders.py b/orders/services/today_orders.py
index 5e2ddc6..061b6f5 100644
--- a/orders/services/today_orders.py
+++ b/orders/services/today_orders.py
@@ -7,7 +7,7 @@ from datetime import datetime, time, timedelta
 from decimal import Decimal
 
 from django.conf import settings
-from django.db import IntegrityError
+from django.db import IntegrityError, transaction
 from django.db.models import Count, Q
 from django.utils import timezone
 
@@ -120,7 +120,43 @@ def _real_qs(club_id: str):
     )
 
 
+def _parse_fake_ids(raw) -> list[int]:
+    if not isinstance(raw, list):
+        return []
+    out = []
+    for x in raw:
+        try:
+            if isinstance(x, bool):
+                continue
+            out.append(int(x))
+        except (TypeError, ValueError):
+            continue
+    return out
+
+
+def _ensure_batch_state(club_id: str) -> TodayOrderFakeBatchState:
+    state = TodayOrderFakeBatchState.query.filter(club_id=club_id).first()
+    if state:
+        return state
+    state = TodayOrderFakeBatchState(club_id=club_id, fake_ids=[], last_shuffle_at=None)
+    try:
+        state.save()
+    except IntegrityError:
+        state = TodayOrderFakeBatchState.query.filter(club_id=club_id).first()
+        if not state:
+            raise
+    return state
+
+
 def _pick_fake_batch(club_id: str, cfg: TodayOrderShowConfig) -> list[TodayOrderFake]:
+    """
+    假单累加展示（惰性，仅有用户请求时推进）：
+    - 当天首次：抽出 batch_size 条，写入状态
+    - 之后每隔 interval_seconds，在原列表上再追加 batch_size（已展示的不变）
+    - 间隔未到：原样返回，刷新不重抽
+    - 无用户刷新：时间到了也不自动变
+    - 跨自然日：清空累加，重新从首批开始
+    """
     if not cfg.mix_enabled or int(cfg.batch_size or 0) <= 0:
         return []
     pool = list(
@@ -128,39 +164,83 @@ def _pick_fake_batch(club_id: str, cfg: TodayOrderShowConfig) -> list[TodayOrder
     )
     if not pool:
         return []
-    batch_n = min(int(cfg.batch_size), len(pool))
+
+    batch_n = max(1, int(cfg.batch_size))
     interval = max(10, int(cfg.interval_seconds or 120))
     now = _now_naive()
-    state = TodayOrderFakeBatchState.query.filter(club_id=club_id).first()
-    need_reshuffle = True
-    ids = []
-    if state and state.last_shuffle_at and isinstance(state.fake_ids, list):
-        last = state.last_shuffle_at
-        if timezone.is_aware(last):
-            last = timezone.make_naive(last)
-        elapsed = (now - last).total_seconds()
-        if elapsed < interval and state.fake_ids:
-            ids = [int(x) for x in state.fake_ids if str(x).isdigit() or isinstance(x, int)]
-            need_reshuffle = False
-    if need_reshuffle:
-        chosen = random.sample(pool, batch_n)
-        ids = [int(x.id) for x in chosen]
+    today = now.date()
+    pool_by_id = {int(x.id): x for x in pool}
+
+    with transaction.atomic():
+        # 行锁，避免并发刷新重复累加
+        state = (
+            TodayOrderFakeBatchState.objects
+            .select_for_update()
+            .filter(club_id=club_id)
+            .first()
+        )
         if not state:
-            state = TodayOrderFakeBatchState(club_id=club_id)
-        state.last_shuffle_at = now
-        state.fake_ids = ids
-        try:
-            state.save()
-        except IntegrityError:
-            # 并发首次创建同一 club 批次行：改更新已有行
-            state = TodayOrderFakeBatchState.query.filter(club_id=club_id).first()
-            if state:
-                state.last_shuffle_at = now
-                state.fake_ids = ids
-                state.save()
-        return chosen
-    id_set = set(ids)
-    return [x for x in pool if int(x.id) in id_set]
+            state = _ensure_batch_state(club_id)
+            state = (
+                TodayOrderFakeBatchState.objects
+                .select_for_update()
+                .filter(club_id=club_id)
+                .first()
+            )
+        if not state:
+            return []
+
+        last = state.last_shuffle_at
+        if last and timezone.is_aware(last):
+            last = timezone.make_naive(last)
+
+        ids = _parse_fake_ids(state.fake_ids)
+        # 跨日重置（不记历史，只保留「当前时段」）
+        if last is None or last.date() != today:
+            ids = []
+            last = None
+
+        # 池子里已删的 id 丢掉，保持展示稳定且可继续追加
+        ids = [i for i in ids if i in pool_by_id]
+        id_set = set(ids)
+
+        add_batches = 0
+        if not ids:
+            add_batches = 1
+        elif last is not None:
+            elapsed = (now - last).total_seconds()
+            if elapsed >= interval:
+                # 离开期间跨过多档则一次补上（仍只在有人刷新时发生）
+                add_batches = int(elapsed // interval)
+
+        if add_batches > 0:
+            available = [x for x in pool if int(x.id) not in id_set]
+            for _ in range(add_batches):
+                if not available:
+                    break
+                n = min(batch_n, len(available))
+                picked = random.sample(available, n)
+                for row in picked:
+                    rid = int(row.id)
+                    ids.append(rid)
+                    id_set.add(rid)
+                available = [x for x in available if int(x.id) not in id_set]
+
+            if last is None:
+                new_last = now
+            else:
+                new_last = last + timedelta(seconds=add_batches * interval)
+                if new_last > now:
+                    new_last = now
+            state.fake_ids = ids
+            state.last_shuffle_at = new_last
+            state.save(update_fields=['fake_ids', 'last_shuffle_at', 'UpdateTime'])
+        elif ids != _parse_fake_ids(state.fake_ids):
+            # 仅清理失效 id
+            state.fake_ids = ids
+            state.save(update_fields=['fake_ids', 'UpdateTime'])
+
+    return [pool_by_id[i] for i in ids if i in pool_by_id]
 
 
 def _serialize_real(o: Order, icon_map: dict[int, str]) -> dict:
@@ -253,7 +333,7 @@ def build_summary(items: list[dict], source: str = 'all') -> dict:
 
 
 def today_order_count(club_id: str) -> dict:
-    """抢单池角标：当日总量（真单 + 当前假批次），不分平台。"""
+    """抢单池角标：当日总量（真单 + 当前已累加假单），不分平台。"""
     cid = (club_id or '').strip()
     if not cid:
         return {'total': 0}