diff --git a/bms-back/ruoyi-admin/src/main/resources/i18n/messages.properties b/bms-back/ruoyi-admin/src/main/resources/i18n/messages.properties
index 44a153d3..7047dc50 100644
--- a/bms-back/ruoyi-admin/src/main/resources/i18n/messages.properties
+++ b/bms-back/ruoyi-admin/src/main/resources/i18n/messages.properties
@@ -142,6 +142,7 @@ price.bill.orderNoRequired=订单号为空
 price.bill.billIdRequired=计费ID为空
 price.bill.notFound=计费记录不存在
 price.bill.customerRequired=订单同步缺少有效客户
+price.bill.alreadyInArBill=订单{0}已生成应收账单，作废后方可重新计费
 price.bill.bizDateRequired=业务日期为空
 
 price.set.version.effectiveTime.empty=版本生效时间不能为空
diff --git a/bms-back/ruoyi-system/src/main/java/com/ruoyi/price/service/impl/PrcOrderBillServiceImpl.java b/bms-back/ruoyi-system/src/main/java/com/ruoyi/price/service/impl/PrcOrderBillServiceImpl.java
index d415e4db..52120ef5 100644
--- a/bms-back/ruoyi-system/src/main/java/com/ruoyi/price/service/impl/PrcOrderBillServiceImpl.java
+++ b/bms-back/ruoyi-system/src/main/java/com/ruoyi/price/service/impl/PrcOrderBillServiceImpl.java
@@ -12,6 +12,7 @@ import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import com.alibaba.fastjson2.JSON;
 import com.alibaba.fastjson2.JSONObject;
+import com.ruoyi.ar.enums.ArOrderBillStatus;
 import com.ruoyi.common.exception.ServiceException;
 import com.ruoyi.common.utils.MessageUtils;
 import com.ruoyi.common.utils.StringUtils;
@@ -71,6 +72,7 @@ public class PrcOrderBillServiceImpl implements IPrcOrderBillService
                 throw new ServiceException(MessageUtils.message("price.bill.bizDateRequired"));
             }
             Date bizDate = resolveBizDate(request.getBizDate());
+            assertOrderBillEditable(request.getOrderNo());
             BigDecimal weight = request.getWeight();
             TmsPriceQuoteResult result = tmsPriceQuoteService.calculate(request);
             persistBill(request, weight, bizDate, result);
@@ -127,6 +129,7 @@ public class PrcOrderBillServiceImpl implements IPrcOrderBillService
         String orderNo = request.getOrderNo();
         String billKey = Md5Utils.hash(orderNo);
         PrcOrderBill existed = orderBillMapper.selectPrcOrderBillByOrderNo(orderNo);
+        assertOrderBillEditable(existed);
         BigDecimal previousIncome = existed == null ? BigDecimal.ZERO : nz(existed.getIncomeTotal());
         PrcOrderBill bill = existed == null ? new PrcOrderBill() : existed;
         if (existed == null)
@@ -204,6 +207,7 @@ public class PrcOrderBillServiceImpl implements IPrcOrderBillService
         result.setFromCache(Boolean.valueOf(existed != null));
         if (existed == null)
         {
+            bill.setArBillStatus(ArOrderBillStatus.UNBILLED.getCode());
             orderBillMapper.insertPrcOrderBill(bill);
         }
         else
@@ -310,6 +314,28 @@ public class PrcOrderBillServiceImpl implements IPrcOrderBillService
         billSearchStore.save(EsLogType.CREDIT, bill.getOrderNo(), req.toJSONString(), resp.toJSONString(), status, err);
     }
 
+    /** Block re-bill when order already claimed by an AR bill (BILLED). Void restores UNBILLED. */
+    private void assertOrderBillEditable(String orderNo)
+    {
+        if (StringUtils.isEmpty(orderNo))
+        {
+            return;
+        }
+        assertOrderBillEditable(orderBillMapper.selectPrcOrderBillByOrderNo(orderNo.trim()));
+    }
+
+    private void assertOrderBillEditable(PrcOrderBill existed)
+    {
+        if (existed == null)
+        {
+            return;
+        }
+        if (ArOrderBillStatus.BILLED.getCode().equals(existed.getArBillStatus()))
+        {
+            throw new ServiceException(MessageUtils.message("price.bill.alreadyInArBill", existed.getOrderNo()));
+        }
+    }
+
     private static BigDecimal nz(BigDecimal v)
     {
         return v == null ? BigDecimal.ZERO : v;
diff --git a/bms-back/ruoyi-system/src/main/resources/mapper/price/PrcOrderBillMapper.xml b/bms-back/ruoyi-system/src/main/resources/mapper/price/PrcOrderBillMapper.xml
index e32eda16..6747106f 100644
--- a/bms-back/ruoyi-system/src/main/resources/mapper/price/PrcOrderBillMapper.xml
+++ b/bms-back/ruoyi-system/src/main/resources/mapper/price/PrcOrderBillMapper.xml
@@ -167,7 +167,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
             set_type, bind_priority, customer_priceset_id, product_country_id,
             weight_min, weight_max, weight_label, effective_date, charge_weight,
             freight_rate, base_freight_rate, discount_percent, registration_fee,
-            freight_amount, surcharge_amount, income_total, pay_total, currency, round_mode,
+            freight_amount, surcharge_amount, income_total, pay_total, currency, ar_bill_status, round_mode,
             create_time
         ) values (
             #{billId}, #{billKey}, #{orderNo}, #{trackingNo}, #{customerId}, #{customerCode}, #{customerName},
@@ -178,7 +178,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
             #{setType}, #{bindPriority}, #{customerPricesetId}, #{productCountryId},
             #{weightMin}, #{weightMax}, #{weightLabel}, #{effectiveDate}, #{chargeWeight},
             #{freightRate}, #{baseFreightRate}, #{discountPercent}, #{registrationFee},
-            #{freightAmount}, #{surchargeAmount}, #{incomeTotal}, #{payTotal}, #{currency}, #{roundMode},
+            #{freightAmount}, #{surchargeAmount}, #{incomeTotal}, #{payTotal}, #{currency}, #{arBillStatus}, #{roundMode},
             sysdate()
         )
     </insert>