diff --git a/apps/backend/src/repositories/order-item-repo.test.ts b/apps/backend/src/repositories/order-item-repo.test.ts
index 34f31e42..560d5414 100644
--- a/apps/backend/src/repositories/order-item-repo.test.ts
+++ b/apps/backend/src/repositories/order-item-repo.test.ts
@@ -1,5 +1,6 @@
 import test from 'node:test'
 import assert from 'node:assert/strict'
+import { readFile } from 'node:fs/promises'
 
 import {
   preserveAssignedOrderItemState,
@@ -202,3 +203,19 @@ test('已分配订单重推写库时不会用平台新 SKU 覆盖冻结值', asy
   assert.equal(updateParams[0]?.[0], 'lucky_coin_x2')
   assert.equal(updateParams[0]?.[1], '幸运币2个')
 })
+
+test('所有替换订单项入口都在同一事务内分摊订单收入', async () => {
+  const source = await readFile(new URL('./order-item-repo.ts', import.meta.url), 'utf8')
+  const replaceSource = source.slice(
+    source.indexOf('export async function replaceOrderItems('),
+    source.indexOf('export async function applyOrderItemRevenueAllocationWithExecutor('),
+  )
+
+  assert.ok(replaceSource.includes('withTransaction'))
+  assert.ok(replaceSource.includes('applyOrderItemRevenueAllocationWithExecutor'))
+  assert.ok(replaceSource.includes('SELECT total_amount FROM orders'))
+  assert.ok(
+    replaceSource.indexOf('replaceOrderItemsWithExecutor') <
+      replaceSource.indexOf('applyOrderItemRevenueAllocationWithExecutor'),
+  )
+})
diff --git a/apps/backend/src/repositories/order-item-repo.ts b/apps/backend/src/repositories/order-item-repo.ts
index 3d218507..326e6a9c 100644
--- a/apps/backend/src/repositories/order-item-repo.ts
+++ b/apps/backend/src/repositories/order-item-repo.ts
@@ -42,9 +42,22 @@ export async function replaceOrderItems(
   orderId: number | string,
   items: OrderItemReplaceInput[],
 ): Promise<OrderItemRow[]> {
-  return withTransaction((client: PoolClient) =>
-    replaceOrderItemsWithExecutor(client.query.bind(client), orderId, items),
-  )
+  return withTransaction(async (client: PoolClient) => {
+    const executor = client.query.bind(client)
+    await replaceOrderItemsWithExecutor(executor, orderId, items)
+    const order = await client.query<{ total_amount: string | number }>(
+      `SELECT total_amount FROM orders WHERE id = $1`,
+      [orderId],
+    )
+    if (order.rows[0]) {
+      await applyOrderItemRevenueAllocationWithExecutor(
+        executor,
+        orderId,
+        Number(order.rows[0].total_amount) || 0,
+      )
+    }
+    return listOrderItemsByOrderIdWithExecutor(executor, orderId)
+  })
 }
 
 export async function applyOrderItemRevenueAllocationWithExecutor(