diff --git a/tests/test_account_assign_filter.py b/tests/test_account_assign_filter.py
index 9d547d1..bee9668 100644
--- a/tests/test_account_assign_filter.py
+++ b/tests/test_account_assign_filter.py
@@ -14,7 +14,11 @@
 
 from tests.support.db import get_test_engine, make_test_session
 from web.backend.models import Account, User
-from web.backend.routers.accounts import batch_assign_accounts, list_accounts
+from web.backend.routers.accounts import (
+    assignments_summary,
+    batch_assign_accounts,
+    list_accounts,
+)
 from web.backend.schemas import BatchAssign
 
 
@@ -97,6 +101,66 @@ class TestAssignFilter(_Base):
         assert self.names(assign_status="unassigned", tag="10.1-测试") == ["tag-a-free"]
 
 
+class TestAssignablePool(_Base):
+    """分配池口径：CK 失效的号必须先修复，不能混进「未分配」让人误分配。"""
+
+    def test_assignable_only_excludes_invalid_ck(self):
+        self.make_account("ap-valid", ck_check_status="valid")
+        self.make_account("ap-unchecked")  # 还没检测过：按可用处理
+        self.make_account("ap-error", ck_check_status="error")  # 查不到 ≠ 失效
+        self.make_account("ap-invalid", ck_check_status="invalid")
+        self.make_account("ap-disabled", ck_check_status="valid", status="disabled")
+
+        assert self.names(assign_status="unassigned", assignable_only=True) == [
+            "ap-valid",
+            "ap-unchecked",
+            "ap-error",
+        ]
+
+    def test_summary_counts_only_assignable(self):
+        self.make_account("as-valid", ck_check_status="valid")
+        self.make_account("as-invalid", ck_check_status="invalid")
+        self.make_account(
+            "as-assigned-valid", ck_check_status="valid", assigned_to=self.support.id
+        )
+        self.make_account(
+            "as-assigned-invalid",
+            ck_check_status="invalid",
+            assigned_to=self.support.id,
+        )
+
+        summary = assignments_summary(db=self.session, current=self.admin)
+
+        assert summary["unassigned_count"] == 1
+        assert summary["assigned_count"] == 1
+        assert summary["total_count"] == 2
+        support = next(
+            u for u in summary["support_users"] if u["id"] == self.support.id
+        )
+        assert support["assigned_count"] == 1
+
+    def test_all_matching_assignable_only_skips_invalid(self):
+        valid = self.make_account("am-valid", ck_check_status="valid")
+        invalid = self.make_account("am-invalid", ck_check_status="invalid")
+
+        result = batch_assign_accounts(
+            BatchAssign(
+                all_matching=True,
+                assign_status="unassigned",
+                assignable_only=True,
+                assigned_to=self.support.id,
+            ),
+            db=self.session,
+            current=self.admin,
+        )
+
+        assert result["count"] == 1
+        self.session.refresh(valid)
+        self.session.refresh(invalid)
+        assert valid.assigned_to == self.support.id
+        assert invalid.assigned_to is None
+
+
 class TestAllMatchingAssign(_Base):
     def test_assigns_every_matching_unassigned(self):
         free = [self.make_account(f"mf-{i}") for i in range(3)]
diff --git a/web/backend/routers/accounts.py b/web/backend/routers/accounts.py
index a6b73d1..2f25822 100644
--- a/web/backend/routers/accounts.py
+++ b/web/backend/routers/accounts.py
@@ -55,10 +55,7 @@ from ..services.account_lifecycle import (
     STATUS_MANUAL,
     set_manual_state,
 )
-from ..services.account_service import (
-    cookie_account_ids_query,
-    parse_and_build_accounts,
-)
+from ..services.account_service import parse_and_build_accounts
 from ..services.account_value import (
     SUIT_BAIRIMENG,
     SUIT_MENGTU,
@@ -84,6 +81,23 @@ def _visible_accounts_query(db: Session, current: User):
     raise HTTPException(status_code=403, detail="无权查看账号")
 
 
+def _assignable_account_filter():
+    """分配池口径：有 CK 且 CK **还没被判失效**，并且没被人工停用/归档。
+
+    - `ck_check_status` 为空 = 还没检测过（`derive_status` 同样按可用处理）；
+    - `error` = 本轮查不到，不代表失效，照常留在池子里；
+    - `invalid` = 巡检已判失效，必须先重登/修复，分配给它也跑不了任何任务。
+    """
+    return and_(
+        cookie_holding_filter(),
+        or_(Account.ck_check_status.is_(None), Account.ck_check_status != "invalid"),
+        or_(
+            Account.status.is_(None),
+            Account.status.notin_([STATUS_DISABLED, STATUS_ARCHIVED]),
+        ),
+    )
+
+
 def _query_str(value) -> str:
     """把查询参数安全地取成字符串。
 
@@ -120,6 +134,7 @@ def _filter_accounts_query(
     assigned_only: bool = False,
     assign_status: str = "",
     assigned_user_id: int | None = None,
+    assignable_only: bool = False,
     tag: str | None = None,
     has_cookie: bool = False,
     search: str = "",
@@ -140,6 +155,8 @@ def _filter_accounts_query(
     """复用列表筛选条件，供分页列表和全量批量操作保持一致。"""
     if _query_bool(has_cookie):
         query = query.filter(Account.cookie.isnot(None), Account.cookie != "")
+    if _query_bool(assignable_only):
+        query = query.filter(_assignable_account_filter())
     if _query_bool(assigned_only) and user_has_permission(current, "account:view_all"):
         query = query.filter(Account.assigned_to.isnot(None))
     # 归属筛选：未分配 / 已分配，再叠加「指定客服」。与其它条件（标签、CK、
@@ -263,6 +280,7 @@ def _selected_account_ids(
                 assigned_only=req.assigned_only,
                 assign_status=req.assign_status,
                 assigned_user_id=req.assigned_user_id,
+                assignable_only=req.assignable_only,
                 tag=req.tag,
                 has_cookie=req.has_cookie,
                 search=req.search,
@@ -416,6 +434,10 @@ def list_accounts(
         "", description="归属筛选：unassigned=未分配 / assigned=已分配；空=全部"
     ),
     assigned_user_id: int | None = Query(None, description="只看某个客服名下的账号"),
+    assignable_only: bool = Query(
+        False,
+        description="只看可分配账号：持 CK 且 CK 未失效（排除已停用/归档）",
+    ),
     tag: str = Query(None),
     account_names: str = Query(
         "", description="多行斗鱼账号名（每行一个），精确匹配并自动去重"
@@ -465,6 +487,7 @@ def list_accounts(
         assigned_only=assigned_only,
         assign_status=assign_status,
         assigned_user_id=assigned_user_id,
+        assignable_only=assignable_only,
         tag=tag,
         has_cookie=has_cookie,
         search=search,
@@ -1113,15 +1136,18 @@ def assignments_summary(
     db: Session = Depends(get_db),
     current: User = Depends(require_permission("account:assign")),
 ):
-    """分配概览：每个客服分配了多少账号（仅统计当前仍持有 CK 的账号）。"""
+    """分配概览：每个客服分到了多少**可分配账号**（持 CK 且 CK 未失效）。
+
+    失效 CK 的账号必须先重登/修复，放进分配池只会让客服以为能跑任务，
+    所以列表、全量分配与这里的统计统一用 `_assignable_account_filter()`。
+    """
     results = (
         db.query(User.id, User.username, func.count(Account.id).label("count"))
         .outerjoin(
             Account,
             and_(
                 Account.assigned_to == User.id,
-                Account.cookie.isnot(None),
-                Account.cookie != "",
+                _assignable_account_filter(),
             ),
         )
         .filter(User.role == "support")
@@ -1133,8 +1159,7 @@ def assignments_summary(
         db.query(func.count(Account.id))
         .filter(
             Account.assigned_to.is_(None),
-            Account.cookie.isnot(None),
-            Account.cookie != "",
+            _assignable_account_filter(),
         )
         .scalar()
     ) or 0
diff --git a/web/backend/schemas.py b/web/backend/schemas.py
index f48af1d..a3754ff 100644
--- a/web/backend/schemas.py
+++ b/web/backend/schemas.py
@@ -207,6 +207,8 @@ class AccountBulkSelection(BaseModel):
     assign_status: str = ""
     #: 只看某个客服名下的账号（与 assign_status 可叠加）
     assigned_user_id: int | None = None
+    #: 分配池口径：持 CK 且 CK 未失效（排除停用/归档）
+    assignable_only: bool = False
     has_cookie: bool = False
     status: str = ""
     ck_status: str = ""
diff --git a/web/frontend/src/api/accounts.ts b/web/frontend/src/api/accounts.ts
index a82be23..f7dab6d 100644
--- a/web/frontend/src/api/accounts.ts
+++ b/web/frontend/src/api/accounts.ts
@@ -25,6 +25,7 @@ export const accountApi = {
       assigned_only?: boolean;
       assign_status?: string;
       assigned_user_id?: number;
+      assignable_only?: boolean;
       tag?: string;
       has_cookie?: boolean;
       include_sensitive?: boolean;
diff --git a/web/frontend/src/api/types.ts b/web/frontend/src/api/types.ts
index b20ff7f..3c2b36b 100644
--- a/web/frontend/src/api/types.ts
+++ b/web/frontend/src/api/types.ts
@@ -36,6 +36,8 @@ export interface AccountBulkSelection {
   assign_status?: string;
   /** 只看某个客服名下的账号 */
   assigned_user_id?: number;
+  /** 分配池口径：持 CK 且 CK 未失效（排除停用/归档） */
+  assignable_only?: boolean;
   has_cookie?: boolean;
   status?: string;
   ck_status?: string;
diff --git a/web/frontend/src/pages/AssignmentsPage.tsx b/web/frontend/src/pages/AssignmentsPage.tsx
index 02980d5..6a25f59 100644
--- a/web/frontend/src/pages/AssignmentsPage.tsx
+++ b/web/frontend/src/pages/AssignmentsPage.tsx
@@ -72,7 +72,9 @@ export default function AssignmentsPage() {
       const params: Parameters<typeof accountApi.listPaged>[0] = {
         page: currentPage,
         page_size: pageSize,
-        has_cookie: true,
+        // 分配池只收「有 CK 且 CK 未失效」的账号：失效号的下一步是重登/修复，
+        // 不是分配给客服（分过去也跑不了任务）。
+        assignable_only: true,
         include_sensitive: false,
         search: searchText.trim() || undefined,
         tag: filterTag || undefined,
@@ -180,6 +182,7 @@ export default function AssignmentsPage() {
       const res = await accountApi.batchAssignSelection({
         all_matching: true,
         assign_status: 'unassigned',
+        assignable_only: true,
         tag: filterTag || undefined,
         search: searchText.trim() || undefined,
         assigned_to: selectedUser.id,
@@ -252,7 +255,7 @@ export default function AssignmentsPage() {
       <Row gutter={12} style={{ flexShrink: 0 }}>
         <Col span={6}>
           <Card size="small">
-            <Statistic title="总账号 (持CK)" value={totalAccountCount} prefix={<TeamOutlined />} />
+            <Statistic title="总账号 (CK 有效)" value={totalAccountCount} prefix={<TeamOutlined />} />
           </Card>
         </Col>
         <Col span={6}>