diff --git a/resources/views/business/pages/courier-payables/stock-quote-entry.blade.php b/resources/views/business/pages/courier-payables/stock-quote-entry.blade.php
index baf19913..6e78e7c8 100644
--- a/resources/views/business/pages/courier-payables/stock-quote-entry.blade.php
+++ b/resources/views/business/pages/courier-payables/stock-quote-entry.blade.php
@@ -33,6 +33,7 @@
             @endif
             <form method="POST" enctype="multipart/form-data" action="{{ $entry ? route('business.courier-stock-quotes.update', $entry) : route('business.courier-stock-quotes.store') }}" data-stock-quote-form>
                 @csrf
+                <input type="hidden" name="courier_expcode" value="{{ old('courier_expcode', $entry?->courier_expcode ?? request('courier_expcode')) }}" data-stock-courier-code>
                 @if($entry) @method('PATCH') @endif
                 <section class="stock-quote__panel">
                     <h2 class="stock-quote__header"><span class="material-icons-outlined" aria-hidden="true">local_shipping</span>第一步：确认快递名称</h2>
@@ -88,6 +89,10 @@
         <script>
             (() => {
                 const form = document.querySelector('[data-stock-quote-form]');
+                const name = form?.querySelector('[data-courier-name-input]');
+                const code = form?.querySelector('[data-stock-courier-code]');
+                const initialName = name?.value.trim(), initialCode = code?.value;
+                name?.addEventListener('input', () => { code.value = name.value.trim() === initialName ? initialCode : ''; });
                 form?.addEventListener('submit', () => {
                     const button = form.querySelector('button[type="submit"]');
                     button.disabled = true;
diff --git a/tests/Feature/Business/CourierStockQuoteEntryTest.php b/tests/Feature/Business/CourierStockQuoteEntryTest.php
index 903aa2b1..bef3a5f3 100644
--- a/tests/Feature/Business/CourierStockQuoteEntryTest.php
+++ b/tests/Feature/Business/CourierStockQuoteEntryTest.php
@@ -350,6 +350,17 @@ class CourierStockQuoteEntryTest extends FeatureTestCase
         $this->withExceptionHandling()->loginAs($this->reviewer(), $this->company)->post(route('business.courier-stock-quotes.period-end', $entry), ['end_date' => '2026-09-30', 'reason' => '公司隔离检查'])->assertNotFound();
     }
 
+    public function test_period_prefill_preserves_selected_code_for_same_named_couriers(): void
+    {
+        $response = $this->loginAs()->get(route('business.courier-stock-quotes.single', ['courier_name' => '同名快递网点', 'courier_expcode' => 'EXP-002', 'quote_type' => '标准快递报价']))->assertOk();
+        $document = new \DOMDocument;
+        @$document->loadHTML($response->getContent(), LIBXML_NONET);
+        $code = (new \DOMXPath($document))->query('//input[@name="courier_expcode"]')->item(0)->getAttribute('value');
+        $this->assertSame('EXP-002', $code);
+        $this->post(route('business.courier-stock-quotes.store'), [...$this->payload(), 'courier_name' => '同名快递网点', 'courier_expcode' => $code])->assertRedirect();
+        $this->assertSame('EXP-002', CourierStockQuoteEntry::firstOrFail()->courier_expcode);
+    }
+
     private function payload(): array
     {
         return ['courier_expcode' => 'EXP-001', 'quote_type' => '标准快递报价', 'source_quote' => $this->workbook(),