diff --git a/app/Console/Commands/ImportDouyinAuthoritativeBills.php b/app/Console/Commands/ImportDouyinAuthoritativeBills.php
index e5a327ce..c096c2b2 100644
--- a/app/Console/Commands/ImportDouyinAuthoritativeBills.php
+++ b/app/Console/Commands/ImportDouyinAuthoritativeBills.php
@@ -9,21 +9,22 @@ use Throwable;
 class ImportDouyinAuthoritativeBills extends Command
 {
     protected $signature = 'business-mirror:import-douyin-authoritative
-        {path : 胜算原始明细 UTF-8 CSV} {month : 完整月份 YYYY-MM}
-        {--count= : 核对笔数} {--income= : 核对收入合计} {--expense= : 核对支出合计}';
+        {path : 胜算原始明细 UTF-8 CSV} {month : 所属月份 YYYY-MM}
+        {--count= : 核对笔数} {--income= : 核对收入合计} {--expense= : 核对支出合计}
+        {--through= : 月初至此日期的完整数据 YYYY-MM-DD，省略时为整月}';
 
-    protected $description = '校验并原子启用完整月份胜算抖音明细，保留旧版本用于回滚';
+    protected $description = '校验并原子启用指定月份或月初至截止日的胜算抖音明细，保留旧版本用于回滚';
 
     public function handle(DouyinAuthoritativeBillImporter $importer): int
     {
         try {
             $result = $importer->import((string) $this->argument('path'), (string) $this->argument('month'),
-                (int) $this->option('count'), (string) $this->option('income'), (string) $this->option('expense'));
+                (int) $this->option('count'), (string) $this->option('income'), (string) $this->option('expense'), $this->option('through'));
         } catch (Throwable $e) {
             $this->error('胜算抖音明细未启用，保留上一版数据。' . ($e instanceof \InvalidArgumentException ? $e->getMessage() : '请检查文件和镜像连接。'));
             return self::FAILURE;
         }
-        $this->info('胜算抖音明细已启用，月份：' . $this->argument('month') . '，笔数：' . $result['row_count']);
+        $this->info('胜算抖音明细已启用，范围：[' . $result['period_start'] . ', ' . $result['period_end'] . ')，笔数：' . $result['row_count']);
         return self::SUCCESS;
     }
 }
diff --git a/docs/上游业务镜像清单.md b/docs/上游业务镜像清单.md
index e672dfb8..c34c7269 100644
--- a/docs/上游业务镜像清单.md
+++ b/docs/上游业务镜像清单.md
@@ -31,6 +31,8 @@
 | 本次接入 | 普通商品资料的工作平台采购价格接入 `jiansun.dbo.pm_priceAdjustment`（镜像 `js_pm_price_adjustment`）：按 `skuCode` 关联 `jst_sku.sku_id`，取 `effectTime` 不晚于当前时间的最新 `purchasePrice`，并在页面和导出中标记“工作平台价格”；源表没有可靠更新时间，按 `Id` 稳定键追加，首次全量完成前只显示普通商品自身采购价。 |
 | 待有效凭据后首次同步 | 普通商品当前成本价、商品类型和更新时间继续读取 `operations_replica.rpt.jst_sku`；`rpt.fys_skuCostPriceUpdate` 是一 SKU 一行的旧快照，不能充当变价历史。完整成本价变更仍读取聚水潭经典开放平台“商品操作日志查询”接口 `worklog.query`，只镜像操作内容含“采购价”的记录到 `jushuitan_cost_price_history_rows`；经典接口必须在服务器私有配置中使用同一应用的 `JUSHUITAN_PARTNER_ID / JUSHUITAN_PARTNER_KEY / JUSHUITAN_TOKEN`，不得把新开放平台的 App Key / App Secret / Access Token 混用。页面在首次同步完成前明确显示待同步或失败，不把 0 条解释为真实无历史。 |
 
+抖音月中校准可在上述导入命令追加 `--through=YYYY-MM-DD`，文件必须包含该月 1 日至截止日（含当天）的全部店铺和流水。系统仅替换这一日期范围，截止日之后继续读取原始账单镜像；省略参数仍表示完整月份。截止日期不得早于同月已校准范围。每天更新时重新导出月初至昨日的完整结果并核对笔数、收支总额，以覆盖迟到及修改记录，不能把单日增量当作月初至截止日的完整结果导入。
+
 ## 经营分析副本库（operations_replica）
 
 店铺维度报表不使用订单件数代替销量。中央刷新节点按上游主键 `Id`
diff --git a/modules/EcommerceFinance/Services/DouyinAuthoritativeBillImporter.php b/modules/EcommerceFinance/Services/DouyinAuthoritativeBillImporter.php
index 9fd0a47d..7d8e3635 100644
--- a/modules/EcommerceFinance/Services/DouyinAuthoritativeBillImporter.php
+++ b/modules/EcommerceFinance/Services/DouyinAuthoritativeBillImporter.php
@@ -9,18 +9,26 @@ use InvalidArgumentException;
 use RuntimeException;
 use Throwable;
 
-/** Imports a complete, explicitly reconciled month without changing upstream bills. */
+/** Imports a reconciled month-to-date range without changing upstream bills. */
 class DouyinAuthoritativeBillImporter
 {
     public function __construct(private readonly DatabaseManager $databases) {}
 
-    public function import(string $path, string $month, int $expectedCount, string $expectedIncome, string $expectedExpense): array
+    public function import(string $path, string $month, int $expectedCount, string $expectedIncome, string $expectedExpense, ?string $through = null): array
     {
         if (! preg_match('/^\d{4}-(0[1-9]|1[0-2])$/', $month) || $expectedCount < 1) {
             throw new InvalidArgumentException('必须指定完整月份和核对后的笔数。');
         }
         $start = $month . '-01';
         $end = Carbon::parse($start)->addMonth()->format('Y-m-d');
+        if ($through !== null) {
+            if (! preg_match('/^\d{4}-\d{2}-\d{2}$/', $through)
+                || ! checkdate((int) substr($through, 5, 2), (int) substr($through, 8, 2), (int) substr($through, 0, 4))
+                || $through < $start || $through >= $end) {
+                throw new InvalidArgumentException('截止日期必须是指定月份内的有效日期。');
+            }
+            $end = Carbon::parse($through)->addDay()->format('Y-m-d');
+        }
         $expectedIncomeCents = $this->cents($expectedIncome);
         $expectedExpenseCents = $this->cents($expectedExpense);
         $file = fopen($path, 'rb');
@@ -91,7 +99,13 @@ class DouyinAuthoritativeBillImporter
                 'row_count' => $count, 'income' => $this->decimal($income), 'expense' => $this->decimal($expense),
                 'imported_at' => now()->format('Y-m-d H:i:s'),
             ];
-            $db->transaction(fn () => $db->table('douyin_authoritative_periods')->updateOrInsert(['period_start' => $start], $state));
+            $db->transaction(function () use ($db, $start, $end, $state): void {
+                $previous = $db->table('douyin_authoritative_periods')->where('period_start', $start)->lockForUpdate()->first();
+                if ($previous !== null && $previous->period_end > $end) {
+                    throw new InvalidArgumentException('截止日期早于已校准范围，请导出包含已校准日期的完整结果。');
+                }
+                $db->table('douyin_authoritative_periods')->updateOrInsert(['period_start' => $start], $state);
+            });
             return $state;
         } catch (Throwable $e) {
             $db->table('douyin_authoritative_bills')->where('generation', $generation)->delete();
diff --git a/tests/Unit/EcommerceFinance/DouyinAuthoritativeBillTest.php b/tests/Unit/EcommerceFinance/DouyinAuthoritativeBillTest.php
index 7cb10925..cce03bf3 100644
--- a/tests/Unit/EcommerceFinance/DouyinAuthoritativeBillTest.php
+++ b/tests/Unit/EcommerceFinance/DouyinAuthoritativeBillTest.php
@@ -126,7 +126,41 @@ class DouyinAuthoritativeBillTest extends TestCase
         $this->assertSame(12.0, app(StoreReceivingDouyinBillMirrorRepository::class)->paginate([], 'occurred_at', 'asc', 1, 10)['summary']['income']);
     }
 
-    private function import(array $rows, int $count, string $income, string $expense): array
+    public function test_cutoff_preserves_later_bills_and_can_advance_without_duplicates(): void
+    {
+        $this->legacy(1, '2026-08-21 23:59:59', 90);
+        $this->legacy(2, '2026-08-22 00:00:00', 9);
+        $firstRow = $this->row('2000000000000000101', '10.00');
+        $first = $this->import([$firstRow], 1, '10.00', '0.00', '2026-08-21');
+        $this->assertSame('2026-08-22', $first['period_end']);
+        $repo = app(StoreReceivingDouyinBillMirrorRepository::class);
+        $this->assertSame(19.0, $repo->paginate([], 'occurred_at', 'asc', 1, 10)['summary']['income']);
+        $this->assertCount(2, iterator_to_array($repo->exportRows([], 'occurred_at', 'asc')));
+        $nextRow = array_replace($this->row('2000000000000000102', '12.00'), ['结算时间' => '2026-08-22 00:00:00']);
+        $second = $this->import([$firstRow, $nextRow], 2, '22.00', '0.00', '2026-08-22');
+        $this->assertSame('2026-08-23', $second['period_end']);
+        $result = $repo->paginate([], 'occurred_at', 'asc', 1, 10);
+        $this->assertSame(2, $result['total']);
+        $this->assertSame(22.0, $result['summary']['income']);
+        $this->assertSame(3, $this->db()->table('douyin_authoritative_bills')->count());
+    }
+
+    public function test_invalid_or_regressing_cutoffs_preserve_active_generation(): void
+    {
+        $row = $this->row('2000000000000000101', '10.00');
+        $initial = $this->import([$row], 1, '10.00', '0.00', '2026-08-21');
+        foreach (['2026-08-20', '2026-08-14', '2026-07-31', '2026-09-01', '2026-08-32', 'invalid', ''] as $through) {
+            try {
+                $this->import([$row], 1, '10.00', '0.00', $through);
+                $this->fail('Invalid cutoff should fail.');
+            } catch (\InvalidArgumentException) {
+                $this->assertSame($initial['active_generation'], $this->db()->table('douyin_authoritative_periods')->value('active_generation'));
+                $this->assertSame(1, $this->db()->table('douyin_authoritative_bills')->count());
+            }
+        }
+    }
+
+    private function import(array $rows, int $count, string $income, string $expense, ?string $through = null): array
     {
         $path = tempnam(sys_get_temp_dir(), 'dy-bills-');
         $this->files[] = $path;
@@ -134,7 +168,7 @@ class DouyinAuthoritativeBillTest extends TestCase
         fputcsv($file, array_keys($rows[0]));
         foreach ($rows as $row) fputcsv($file, array_values($row));
         fclose($file);
-        return app(DouyinAuthoritativeBillImporter::class)->import($path, '2026-08', $count, $income, $expense);
+        return app(DouyinAuthoritativeBillImporter::class)->import($path, '2026-08', $count, $income, $expense, $through);
     }
 
     private function row(string $code, string $income, string $expense = '0.00'): array