diff --git a/inventory-web/src/views/transaction/borrow.vue b/inventory-web/src/views/transaction/borrow.vue
index 58f4058..7927728 100644
--- a/inventory-web/src/views/transaction/borrow.vue
+++ b/inventory-web/src/views/transaction/borrow.vue
@@ -435,6 +435,8 @@ const handleApprovalChange = (val: number | null) => {
     isIndefinite.value = false
     form.expected_return_time = ''
   }
+  // ★ 自动关联：把该借库申请单的“申请原因(remark)”自动带入执行备注，库管无需重复填写（可手动改）
+  form.remark = (req && req.remark) || ''
   cartItems.value = []
   signatureFile.value = null
   signaturePreviewUrl.value = ''