diff --git a/backend/internal/handler/admin/account_handler_mixed_channel_test.go b/backend/internal/handler/admin/account_handler_mixed_channel_test.go
index 24ec5bcf..929dc240 100644
--- a/backend/internal/handler/admin/account_handler_mixed_channel_test.go
+++ b/backend/internal/handler/admin/account_handler_mixed_channel_test.go
@@ -196,3 +196,29 @@ func TestAccountHandlerBulkUpdateMixedChannelConfirmSkips(t *testing.T) {
 	require.Equal(t, float64(2), data["success"])
 	require.Equal(t, float64(0), data["failed"])
 }
+
+func TestBulkUpdateAcceptsFilterTargetRequest(t *testing.T) {
+	adminSvc := newStubAdminService()
+	router := setupAccountMixedChannelRouter(adminSvc)
+
+	body, _ := json.Marshal(map[string]any{
+		"filters": map[string]any{
+			"platform":     "openai",
+			"type":         "oauth",
+			"status":       "active",
+			"group":        "12",
+			"privacy_mode": "blocked",
+			"search":       "bulk-target",
+		},
+		"schedulable": true,
+	})
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/admin/accounts/bulk-update", bytes.NewReader(body))
+	req.Header.Set("Content-Type", "application/json")
+	router.ServeHTTP(rec, req)
+
+	require.Equal(t, http.StatusOK, rec.Code)
+	var resp map[string]any
+	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
+	require.Equal(t, float64(0), resp["code"])
+}
diff --git a/backend/internal/service/admin_service_bulk_update_test.go b/backend/internal/service/admin_service_bulk_update_test.go
index 4845d87c..df415295 100644
--- a/backend/internal/service/admin_service_bulk_update_test.go
+++ b/backend/internal/service/admin_service_bulk_update_test.go
@@ -5,8 +5,10 @@ package service
 import (
 	"context"
 	"errors"
+	"reflect"
 	"testing"
 
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 	"github.com/stretchr/testify/require"
 )
 
@@ -25,6 +27,19 @@ type accountRepoStubForBulkUpdate struct {
 	getByIDCalled    []int64
 	listByGroupData  map[int64][]Account
 	listByGroupErr   map[int64]error
+	listData         []Account
+	listResult       *pagination.PaginationResult
+	listErr          error
+	listCalled       bool
+	lastListParams   pagination.PaginationParams
+	lastListFilters  struct {
+		platform    string
+		accountType string
+		status      string
+		search      string
+		groupID     int64
+		privacyMode string
+	}
 }
 
 func (s *accountRepoStubForBulkUpdate) BulkUpdate(_ context.Context, ids []int64, _ AccountBulkUpdate) (int64, error) {
@@ -73,6 +88,24 @@ func (s *accountRepoStubForBulkUpdate) ListByGroup(_ context.Context, groupID in
 	return nil, nil
 }
 
+func (s *accountRepoStubForBulkUpdate) ListWithFilters(_ context.Context, params pagination.PaginationParams, platform, accountType, status, search string, groupID int64, privacyMode string) ([]Account, *pagination.PaginationResult, error) {
+	s.listCalled = true
+	s.lastListParams = params
+	s.lastListFilters.platform = platform
+	s.lastListFilters.accountType = accountType
+	s.lastListFilters.status = status
+	s.lastListFilters.search = search
+	s.lastListFilters.groupID = groupID
+	s.lastListFilters.privacyMode = privacyMode
+	if s.listErr != nil {
+		return nil, nil, s.listErr
+	}
+	if s.listResult != nil {
+		return s.listData, s.listResult, nil
+	}
+	return s.listData, &pagination.PaginationResult{Total: int64(len(s.listData))}, nil
+}
+
 // TestAdminService_BulkUpdateAccounts_AllSuccessIDs 验证批量更新成功时返回 success_ids/failed_ids。
 func TestAdminService_BulkUpdateAccounts_AllSuccessIDs(t *testing.T) {
 	repo := &accountRepoStubForBulkUpdate{}
@@ -170,3 +203,46 @@ func TestAdminService_BulkUpdateAccounts_MixedChannelPreCheckBlocksOnExistingCon
 	// No BindGroups should have been called since the check runs before any write.
 	require.Empty(t, repo.bindGroupsCalls)
 }
+
+func TestAdminServiceBulkUpdateAccounts_ResolvesIDsFromFilters(t *testing.T) {
+	repo := &accountRepoStubForBulkUpdate{
+		listData: []Account{
+			{ID: 7},
+			{ID: 11},
+		},
+		listResult: &pagination.PaginationResult{Total: 2},
+	}
+	svc := &adminServiceImpl{accountRepo: repo}
+
+	schedulable := true
+	input := &BulkUpdateAccountsInput{
+		Schedulable: &schedulable,
+	}
+
+	filtersField := reflect.ValueOf(input).Elem().FieldByName("Filters")
+	require.True(t, filtersField.IsValid(), "BulkUpdateAccountsInput should expose Filters for filter-target bulk update")
+	require.Equal(t, reflect.Ptr, filtersField.Kind(), "BulkUpdateAccountsInput.Filters should be a pointer field")
+
+	filtersValue := reflect.New(filtersField.Type().Elem())
+	filtersValue.Elem().FieldByName("Platform").SetString(PlatformOpenAI)
+	filtersValue.Elem().FieldByName("Type").SetString(AccountTypeOAuth)
+	filtersValue.Elem().FieldByName("Status").SetString(StatusActive)
+	filtersValue.Elem().FieldByName("Group").SetString("12")
+	filtersValue.Elem().FieldByName("PrivacyMode").SetString(PrivacyModeCFBlocked)
+	filtersValue.Elem().FieldByName("Search").SetString("bulk-target")
+	filtersField.Set(filtersValue)
+
+	result, err := svc.BulkUpdateAccounts(context.Background(), input)
+	require.NoError(t, err)
+	require.True(t, repo.listCalled, "expected filter-target bulk update to resolve matching IDs via account list filters")
+	require.Equal(t, PlatformOpenAI, repo.lastListFilters.platform)
+	require.Equal(t, AccountTypeOAuth, repo.lastListFilters.accountType)
+	require.Equal(t, StatusActive, repo.lastListFilters.status)
+	require.Equal(t, "bulk-target", repo.lastListFilters.search)
+	require.Equal(t, int64(12), repo.lastListFilters.groupID)
+	require.Equal(t, PrivacyModeCFBlocked, repo.lastListFilters.privacyMode)
+	require.Equal(t, []int64{7, 11}, repo.bulkUpdateIDs)
+	require.Equal(t, 2, result.Success)
+	require.Equal(t, 0, result.Failed)
+	require.Equal(t, []int64{7, 11}, result.SuccessIDs)
+}