diff --git a/modules/EcommerceFinance/Repositories/SmallPaymentWorkOrderMirrorRepository.php b/modules/EcommerceFinance/Repositories/SmallPaymentWorkOrderMirrorRepository.php
index a949e337..fcc80bb6 100644
--- a/modules/EcommerceFinance/Repositories/SmallPaymentWorkOrderMirrorRepository.php
+++ b/modules/EcommerceFinance/Repositories/SmallPaymentWorkOrderMirrorRepository.php
@@ -40,6 +40,9 @@ class SmallPaymentWorkOrderMirrorRepository
 
     private const COMPLETED_WORK_ORDER_STATUSES = ['CONFIRMED', '已完成', '已确认'];
 
+    /** 打款金额在 businessFieldList 中的候选字段名（按优先级） */
+    private const PAYMENT_AMOUNT_FIELDS = ['打款金额', '付款金额', '小额打款金额', 'amountField'];
+
     private readonly ConnectionInterface $connection;
 
     public function __construct(
@@ -177,18 +180,48 @@ class SmallPaymentWorkOrderMirrorRepository
     }
 
     /**
+     * 统计当前筛选条件下全部记录的打款金额合计。
+     *
+     * 只取金额所需字段，按 Id 做键集分块批量读取：不使用逐行游标（本地/远端库时每次取行都是一次网络往返），
+     * 也不复用导出用的分页排序查询（会为大结果集重复执行连接与排序）。
+     *
      * @param array{from:string,to:string,work_order_no:string,shop_name:string,transaction_no:string,online_order_no:string,status:string,payment_reason:string} $filters
      */
-    public function filteredPaymentAmount(array $filters): string
+    public function filteredPaymentAmount(array $filters, int $chunkSize = 1000): string
     {
         $this->ensureReady();
 
-        $amounts = [];
-        foreach ($this->exportRows($filters, 100) as $row) {
-            $amounts[] = $row['payment_amount'] ?? null;
-        }
+        $query = $this->baseQuery();
+        $this->applyFilters($query, $filters);
 
-        return $this->sumMoney($amounts);
+        $chunkSize = min(max($chunkSize, 100), 5000);
+        $cents = 0;
+        $lastId = null;
+
+        do {
+            $chunk = (clone $query)
+                ->select(['w.Id AS source_id', 'w.businessFieldList'])
+                ->when($lastId !== null, static fn (Builder $q): Builder => $q->where('w.Id', '>', $lastId))
+                ->orderBy('w.Id')
+                ->limit($chunkSize)
+                ->get();
+
+            foreach ($chunk as $row) {
+                $cents += $this->centsFromMoney($this->paymentAmountOf($row->businessFieldList ?? null));
+            }
+
+            $lastId = $chunk->isEmpty() ? null : $chunk->last()->source_id;
+        } while ($chunk->count() === $chunkSize);
+
+        return $this->formatCents($cents);
+    }
+
+    private function paymentAmountOf(mixed $businessFieldList): ?string
+    {
+        return $this->money($this->field(
+            $this->businessFields($businessFieldList),
+            self::PAYMENT_AMOUNT_FIELDS,
+        ));
     }
 
     /**
@@ -390,9 +423,7 @@ class SmallPaymentWorkOrderMirrorRepository
         $row['alipay_batch_no'] = $this->field($fields, [
             '支付宝批次号', '支付宝打款批次号', '打款批次号', '批次号', 'alipayBatchNo', 'batchNo',
         ]);
-        $row['payment_amount'] = $this->money($this->field($fields, [
-            '打款金额', '付款金额', '小额打款金额', 'amountField',
-        ]));
+        $row['payment_amount'] = $this->money($this->field($fields, self::PAYMENT_AMOUNT_FIELDS));
         $row['online_order_no'] = $this->firstFilled(
             $this->field($fields, ['线上订单号', '线上单号', '订单号', 'orderField']),
             $row['mapped_online_order_no'] ?? null,
@@ -535,14 +566,26 @@ class SmallPaymentWorkOrderMirrorRepository
     {
         $cents = 0;
         foreach ($amounts as $amount) {
-            if ($amount === null || ! preg_match('/^(-?)(\d+)\.(\d{2})$/', (string) $amount, $matches)) {
-                continue;
-            }
-
-            $value = ((int) $matches[2] * 100) + (int) $matches[3];
-            $cents += $matches[1] === '-' ? -$value : $value;
+            $cents += $this->centsFromMoney($amount);
         }
 
+        return $this->formatCents($cents);
+    }
+
+    /** 将 '123.45' / '-123.45' 形式的金额字符串转成分（无效值计 0）。 */
+    private function centsFromMoney(mixed $amount): int
+    {
+        if ($amount === null || ! preg_match('/^(-?)(\d+)\.(\d{2})$/', (string) $amount, $matches)) {
+            return 0;
+        }
+
+        $value = ((int) $matches[2] * 100) + (int) $matches[3];
+
+        return $matches[1] === '-' ? -$value : $value;
+    }
+
+    private function formatCents(int $cents): string
+    {
         $sign = $cents < 0 ? '-' : '';
         $absolute = abs($cents);