diff --git a/app/admin/repositories/cps.py b/app/admin/repositories/cps.py
index fcb0565..68b10e0 100644
--- a/app/admin/repositories/cps.py
+++ b/app/admin/repositories/cps.py
@@ -17,7 +17,7 @@ from app.integrations import meituan
 from app.repositories import cps_link as cps_link_repo
 from app.models.cps_activity import CpsActivity
 from app.models.cps_group import CpsGroup
-from app.models.cps_link import CpsClick
+from app.models.cps_link import CpsClick, CpsLink
 from app.models.cps_order import CpsOrder
 from app.models.cps_wx_user import CpsWxUser
 
@@ -524,3 +524,90 @@ def group_wx_users(db: Session, *, group_id: int, limit: int = 200) -> list[dict
     ]
     result.sort(key=lambda x: x["first_seen"], reverse=True)
     return result[:limit]
+
+
+def group_day_users(
+    db: Session, *, group_id: int, start: datetime, end: datetime, limit: int = 200,
+) -> list[dict]:
+    """该群某天(北京)以用户为单位的领券/点击 + 每人 visit 过的券。
+
+    时间窗为半开区间 [start, end)(end=次日 00:00),避免午夜双计。只统计 openid 非空
+    (可归属到人)的点击 —— 匿名点击(美团/京东 302 多为匿名)不计入。券名 = 该点击 link
+    对应活动名;活动被硬删则兜底 活动#{id}。copy=领券次数、visit=点击次数;coupons 仅
+    取 visit 事件按活动分组、按次数倒序(合计 = visit_count)。排序:领券 desc、再点击 desc。
+    与 group_wx_users 同风格(Python 侧聚合,跨 PG/SQLite 无方言坑)。
+
+    注:每日明细行的 click_pv/copy_pv 计全部点击(含匿名、UV 按 ip,ua);本函数只计 openid
+    用户,故各用户求和 <= 当天行总数,二者口径不同、不必相等。
+    """
+    rows = db.execute(
+        select(CpsClick.openid, CpsClick.event_type, CpsClick.link_id)
+        .where(CpsClick.group_id == group_id)
+        .where(CpsClick.clicked_at >= _as_utc(start))
+        .where(CpsClick.clicked_at < _as_utc(end))
+        .where(CpsClick.openid.is_not(None))
+    ).all()
+    if not rows:
+        return []
+
+    # link_id -> activity_id -> 券名(活动名)
+    link_ids = {r.link_id for r in rows}
+    link_to_act = dict(
+        db.execute(
+            select(CpsLink.id, CpsLink.activity_id).where(CpsLink.id.in_(link_ids))
+        ).all()
+    )
+    act_ids = {aid for aid in link_to_act.values() if aid is not None}
+    act_name = (
+        dict(
+            db.execute(
+                select(CpsActivity.id, CpsActivity.name).where(CpsActivity.id.in_(act_ids))
+            ).all()
+        )
+        if act_ids
+        else {}
+    )
+
+    def _coupon_name(link_id: int) -> str:
+        aid = link_to_act.get(link_id)
+        if aid is None:
+            return f"链接#{link_id}"
+        return act_name.get(aid) or f"活动#{aid}"
+
+    stat: dict[str, dict] = {}
+    for openid, event_type, link_id in rows:
+        s = stat.setdefault(openid, {"copy": 0, "visit": 0, "coupons": {}})
+        if event_type == "copy":
+            s["copy"] += 1
+        else:
+            s["visit"] += 1
+            name = _coupon_name(link_id)
+            s["coupons"][name] = s["coupons"].get(name, 0) + 1
+
+    openids = list(stat.keys())
+    users = {
+        u.openid: u
+        for u in db.execute(
+            select(CpsWxUser).where(CpsWxUser.openid.in_(openids))
+        ).scalars().all()
+    }
+
+    result = [
+        {
+            "openid": openid,
+            "nickname": users[openid].nickname if openid in users else None,
+            "headimgurl": users[openid].headimgurl if openid in users else None,
+            "copy_count": s["copy"],
+            "visit_count": s["visit"],
+            "coupons": [
+                {"name": name, "count": cnt}
+                # 次数倒序;同次数按券名升序兜底,保证 PG 无 ORDER BY 行序下输出稳定
+                for name, cnt in sorted(
+                    s["coupons"].items(), key=lambda kv: (-kv[1], kv[0])
+                )
+            ],
+        }
+        for openid, s in stat.items()
+    ]
+    result.sort(key=lambda x: (x["copy_count"], x["visit_count"]), reverse=True)
+    return result[:limit]
diff --git a/app/admin/routers/cps.py b/app/admin/routers/cps.py
index a1fd267..aa69270 100644
--- a/app/admin/routers/cps.py
+++ b/app/admin/routers/cps.py
@@ -468,7 +468,7 @@ def group_daily(
     while cur <= last:
         cp = click_points[idx] if idx < len(click_points) else None
         row = {
-            "date": cur.strftime("%m-%d"),
+            "date": cur.strftime("%Y-%m-%d"),
             "click_pv": cp["click_pv"] if cp else 0,
             "click_uv": cp["click_uv"] if cp else 0,
             "copy_pv": cp["copy_pv"] if cp else 0,
@@ -496,3 +496,28 @@ def group_wx_users(group_id: int, db: AdminDb) -> dict:
     if group is None:
         raise HTTPException(status_code=404, detail="群不存在")
     return {"users": cps_repo.group_wx_users(db, group_id=group_id)}
+
+
+@router.get("/groups/{group_id}/day-users", summary="某天该群按用户的领券/点击 + 每人点过的券")
+def group_day_users(
+    group_id: int,
+    db: AdminDb,
+    date: Annotated[str, Query(description="北京日期 YYYY-MM-DD")],
+) -> dict:
+    group = cps_repo.get_group(db, group_id)
+    if group is None:
+        raise HTTPException(status_code=404, detail="群不存在")
+    bj = timezone(timedelta(hours=8))
+    try:
+        day0 = datetime.strptime(date, "%Y-%m-%d").replace(tzinfo=bj)
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail="date 格式应为 YYYY-MM-DD") from e
+    start = day0.replace(hour=0, minute=0, second=0, microsecond=0)
+    end = start + timedelta(days=1)
+    users = cps_repo.group_day_users(db, group_id=group_id, start=start, end=end)
+    return {
+        "group_id": group.id,
+        "group_name": group.name,
+        "date": date,
+        "users": users,
+    }
diff --git a/tests/test_cps_admin.py b/tests/test_cps_admin.py
new file mode 100644
index 0000000..f3c04ab
--- /dev/null
+++ b/tests/test_cps_admin.py
@@ -0,0 +1,182 @@
+"""admin CPS 端点测试:每日明细 date 格式 + 按天按用户领券下钻(/day-users)。"""
+from __future__ import annotations
+
+from datetime import date, datetime, timedelta, timezone
+
+import pytest
+from fastapi.testclient import TestClient
+
+from app.admin.main import admin_app
+from app.admin.repositories import admin_user as admin_repo
+from app.admin.repositories import cps as cps_repo
+from app.db.session import SessionLocal
+from app.models.cps_link import CpsClick
+from app.models.cps_wx_user import CpsWxUser
+from app.repositories import cps_link as cps_link_repo
+
+_BJ = timezone(timedelta(hours=8))
+
+
+@pytest.fixture()
+def admin_client() -> TestClient:
+    return TestClient(admin_app)
+
+
+@pytest.fixture()
+def admin_token() -> str:
+    db = SessionLocal()
+    try:
+        if admin_repo.get_by_username(db, "cps_test_admin") is None:
+            admin_repo.create_admin(
+                db, username="cps_test_admin", password="cps-pass", role="super_admin"
+            )
+    finally:
+        db.close()
+    c = TestClient(admin_app)
+    r = c.post("/admin/api/auth/login", json={"username": "cps_test_admin", "password": "cps-pass"})
+    return r.json()["access_token"]
+
+
+def _auth(token: str) -> dict:
+    return {"Authorization": f"Bearer {token}"}
+
+
+def _seed_cps_day(day_bj: date) -> tuple[int, str]:
+    """造淘宝群 + 2 个活动(券) + 2 条 link + day_bj 当天点击(含匿名 + 次日各 1) + 授权画像。
+
+    o_user(本群唯一):券A visit×3、券B visit×2、copy×2 → visit_count=5、copy_count=2。
+    另造 1 条匿名 visit(openid=None)与 1 条次日 visit,均不应计入当天该用户聚合。
+    clicked_at 统一存 tz-aware UTC(SQLite DateTime 按字段渲染、忽略 tzinfo;
+    转 UTC 后字段即 UTC 墙钟,与 repo 侧 _as_utc 比较口径一致)。返回 (group_id, openid)。
+    """
+    db = SessionLocal()
+    try:
+        gid = cps_repo.create_group(db, name="下钻测试群", platforms=["taobao"]).id
+        openid = f"od_user_{gid}"  # 按群唯一,规避 CpsWxUser.openid 唯一约束跨用例冲突
+        a1 = cps_repo.create_activity(db, name="618神券", platform="taobao", payload="tkl-1")
+        a2 = cps_repo.create_activity(db, name="买一送一", platform="taobao", payload="tkl-2")
+        link1 = cps_link_repo.create_link(
+            db, group_id=gid, activity_id=a1.id, sid=None, target_url="t1", platform="taobao"
+        )
+        link2 = cps_link_repo.create_link(
+            db, group_id=gid, activity_id=a2.id, sid=None, target_url="t2", platform="taobao"
+        )
+        db.add(CpsWxUser(openid=openid, nickname="张三", headimgurl="https://h/1"))
+        db.commit()
+
+        def at(hour: int) -> datetime:
+            return datetime(day_bj.year, day_bj.month, day_bj.day, hour, tzinfo=_BJ).astimezone(
+                timezone.utc
+            )
+
+        for _ in range(3):
+            db.add(CpsClick(link_id=link1.id, group_id=gid, sid=None,
+                            event_type="visit", openid=openid, clicked_at=at(10)))
+        for _ in range(2):
+            db.add(CpsClick(link_id=link2.id, group_id=gid, sid=None,
+                            event_type="visit", openid=openid, clicked_at=at(11)))
+        for _ in range(2):
+            db.add(CpsClick(link_id=link1.id, group_id=gid, sid=None,
+                            event_type="copy", openid=openid, clicked_at=at(12)))
+        # 匿名点击 — 不计入
+        db.add(CpsClick(link_id=link1.id, group_id=gid, sid=None,
+                        event_type="visit", openid=None, clicked_at=at(13)))
+        # 次日点击 — 验证时间窗,不计入当天
+        nxt = (datetime(day_bj.year, day_bj.month, day_bj.day, 10, tzinfo=_BJ)
+               + timedelta(days=1)).astimezone(timezone.utc)
+        db.add(CpsClick(link_id=link1.id, group_id=gid, sid=None,
+                        event_type="visit", openid=openid, clicked_at=nxt))
+        db.commit()
+        return gid, openid
+    finally:
+        db.close()
+
+
+def test_daily_date_is_full_iso(admin_client: TestClient, admin_token: str) -> None:
+    """/daily 每行 date 改为 YYYY-MM-DD(10 字符、两个连字符),不再是 MM-DD。"""
+    gid, _ = _seed_cps_day(date(2026, 6, 25))
+    r = admin_client.get(
+        f"/admin/api/cps/groups/{gid}/daily", params={"days": 3}, headers=_auth(admin_token)
+    )
+    assert r.status_code == 200, r.text
+    rows = r.json()["rows"]
+    assert rows, "应有按天补零行"
+    for row in rows:
+        assert len(row["date"]) == 10 and row["date"].count("-") == 2, row["date"]
+
+
+def test_day_users_aggregates(admin_client: TestClient, admin_token: str) -> None:
+    """当天该群:仅授权用户;领券=copy、点击=visit;coupons=visit 券×次数倒序、合计=点击次数。"""
+    gid, openid = _seed_cps_day(date(2026, 6, 25))
+    r = admin_client.get(
+        f"/admin/api/cps/groups/{gid}/day-users",
+        params={"date": "2026-06-25"},
+        headers=_auth(admin_token),
+    )
+    assert r.status_code == 200, r.text
+    body = r.json()
+    assert body["group_id"] == gid
+    assert body["date"] == "2026-06-25"
+    users = body["users"]
+    assert len(users) == 1  # 匿名不计、次日不计
+    u = users[0]
+    assert u["openid"] == openid
+    assert u["nickname"] == "张三"
+    assert u["headimgurl"] == "https://h/1"
+    assert u["copy_count"] == 2
+    assert u["visit_count"] == 5
+    assert [c["name"] for c in u["coupons"]] == ["618神券", "买一送一"]
+    assert [c["count"] for c in u["coupons"]] == [3, 2]
+    assert sum(c["count"] for c in u["coupons"]) == u["visit_count"]
+
+
+def test_day_users_group_not_found(admin_client: TestClient, admin_token: str) -> None:
+    r = admin_client.get(
+        "/admin/api/cps/groups/999999/day-users",
+        params={"date": "2026-06-25"},
+        headers=_auth(admin_token),
+    )
+    assert r.status_code == 404
+
+
+def test_day_users_bad_date(admin_client: TestClient, admin_token: str) -> None:
+    gid, _ = _seed_cps_day(date(2026, 6, 25))
+    r = admin_client.get(
+        f"/admin/api/cps/groups/{gid}/day-users",
+        params={"date": "2026/06/25"},  # 非 YYYY-MM-DD
+        headers=_auth(admin_token),
+    )
+    assert r.status_code == 400
+
+
+def test_day_users_requires_auth(admin_client: TestClient) -> None:
+    r = admin_client.get(
+        "/admin/api/cps/groups/1/day-users", params={"date": "2026-06-25"}
+    )
+    assert r.status_code == 401
+
+
+def test_day_users_empty_when_no_clicks(admin_client: TestClient, admin_token: str) -> None:
+    gid, _ = _seed_cps_day(date(2026, 6, 25))
+    r = admin_client.get(
+        f"/admin/api/cps/groups/{gid}/day-users",
+        params={"date": "2026-06-20"},  # 该群当天无任何点击
+        headers=_auth(admin_token),
+    )
+    assert r.status_code == 200
+    assert r.json()["users"] == []
+
+
+def test_day_users_cross_year(admin_client: TestClient, admin_token: str) -> None:
+    """跨年:YYYY-MM-DD 才能精确定位 12-31(MM-DD 会丢年份);次日(次年 01-01)不计入。"""
+    gid, openid = _seed_cps_day(date(2025, 12, 31))
+    r = admin_client.get(
+        f"/admin/api/cps/groups/{gid}/day-users",
+        params={"date": "2025-12-31"},
+        headers=_auth(admin_token),
+    )
+    assert r.status_code == 200, r.text
+    users = r.json()["users"]
+    assert len(users) == 1
+    assert users[0]["openid"] == openid
+    assert users[0]["visit_count"] == 5  # 次年 01-01 那条被时间窗排除