diff --git a/ruoyi-sip/src/main/java/com/ruoyi/sip/mapper/ProductInfoMapper.java b/ruoyi-sip/src/main/java/com/ruoyi/sip/mapper/ProductInfoMapper.java
index 7f82d5e0..b355cb12 100644
--- a/ruoyi-sip/src/main/java/com/ruoyi/sip/mapper/ProductInfoMapper.java
+++ b/ruoyi-sip/src/main/java/com/ruoyi/sip/mapper/ProductInfoMapper.java
@@ -79,4 +79,6 @@ public interface ProductInfoMapper
     void updateCount(List<ProductInfo> values);
 
     List<ProductInfo> listInventory(ProductInfo info);
+
+    ProductInfo selectProductInfoByBomCode(String productCode);
 }
diff --git a/ruoyi-sip/src/main/java/com/ruoyi/sip/service/impl/OmsPurchaseOrderServiceImpl.java b/ruoyi-sip/src/main/java/com/ruoyi/sip/service/impl/OmsPurchaseOrderServiceImpl.java
index 12f9ad67..d5c3e8ed 100644
--- a/ruoyi-sip/src/main/java/com/ruoyi/sip/service/impl/OmsPurchaseOrderServiceImpl.java
+++ b/ruoyi-sip/src/main/java/com/ruoyi/sip/service/impl/OmsPurchaseOrderServiceImpl.java
@@ -20,9 +20,7 @@ import com.ruoyi.sip.flowable.domain.Todo;
 import com.ruoyi.sip.flowable.service.DeleteFlowableProcessInstanceCmd;
 import com.ruoyi.sip.flowable.service.TodoCommonTemplate;
 import com.ruoyi.sip.flowable.service.TodoService;
-import com.ruoyi.sip.mapper.OmsPurchaseOrderItemHistoryMapper;
-import com.ruoyi.sip.mapper.OmsPurchaseOrderHistoryMapper;
-import com.ruoyi.sip.mapper.VendorInfoMapper;
+import com.ruoyi.sip.mapper.*;
 import com.ruoyi.sip.service.*;
 import com.ruoyi.system.mapper.SysUserMapper;
 import lombok.extern.slf4j.Slf4j;
@@ -38,7 +36,6 @@ import org.springframework.stereotype.Service;
 
 import com.ruoyi.common.utils.StringUtils;
 import org.springframework.transaction.annotation.Transactional;
-import com.ruoyi.sip.mapper.OmsPurchaseOrderMapper;
 
 import javax.annotation.Resource;
 
@@ -67,6 +64,9 @@ public class OmsPurchaseOrderServiceImpl implements IOmsPurchaseOrderService, To
     @Resource
     private VendorInfoMapper vendorInfoMapper;
 
+    @Resource
+    private ProductInfoMapper productInfoMapper;
+
     @Resource
     private SysUserMapper userMapper;
 
@@ -646,10 +646,26 @@ public class OmsPurchaseOrderServiceImpl implements IOmsPurchaseOrderService, To
         orderItem.setProductType(addToNexReq.getProductType());
         orderItem.setProductCode(addToNexReq.getProductCode());
         orderItem.setQuantity(new BigDecimal(addToNexReq.getQuantity()));
-        orderItem.setPrice(addToNexReq.getPrice());
-        orderItem.setTaxRate(addToNexReq.getTaxRate());
-        orderItem.setTaxTotal(addToNexReq.getTaxTotal());
 
+        // 根据BOM编码查询产品信息，折扣，单价和税率都从产品信息读
+        log.info("通过BOM编码查询产品信息");
+        ProductInfo productInfo = productInfoMapper.selectProductInfoByBomCode(addToNexReq.getProductCode());
+        if (productInfo == null) {
+            throw new ServiceException("未找到BOM编码对应的产品信息: " + addToNexReq.getProductCode());
+        }
+        log.info("通过BOM编码查询产品信息");
+        // 将String类型转换为BigDecimal
+        BigDecimal price = new BigDecimal(productInfo.getCataloguePrice() != null ? productInfo.getCataloguePrice() : "0");
+        BigDecimal taxRate = new BigDecimal(productInfo.getGuidanceDiscount() != null ? productInfo.getGuidanceDiscount() : "0");
+
+        orderItem.setPrice(price);
+        orderItem.setTaxRate(taxRate);
+
+        // 税额 = 单价 * 数量 - (单价 * 数量) / (1 + 税率)，结果取两位小数
+        BigDecimal quantity = orderItem.getQuantity();
+        BigDecimal totalAmount = price.multiply(quantity);
+        BigDecimal taxTotal = totalAmount.subtract(totalAmount.divide(BigDecimal.ONE.add(taxRate), 2, BigDecimal.ROUND_HALF_UP));
+        orderItem.setTaxTotal(taxTotal.setScale(2, BigDecimal.ROUND_HALF_UP));
         // 根据传入的参数计算金额
         BigDecimal amountTotal = addToNexReq.getPrice() != null && addToNexReq.getQuantity() != null
                 ? addToNexReq.getPrice().multiply(new BigDecimal(addToNexReq.getQuantity()))
diff --git a/ruoyi-sip/src/main/resources/mapper/system/ProductInfoMapper.xml b/ruoyi-sip/src/main/resources/mapper/system/ProductInfoMapper.xml
index 9275a710..78014779 100644
--- a/ruoyi-sip/src/main/resources/mapper/system/ProductInfoMapper.xml
+++ b/ruoyi-sip/src/main/resources/mapper/system/ProductInfoMapper.xml
@@ -259,4 +259,12 @@
         </foreach>
     </delete>
 
+
+    <select id="selectProductInfoByBomCode" parameterType="String" resultMap="ProductInfoResult">
+        <include refid="selectProductInfoVo"/>
+        where t1.product_code = #{productCode}
+        and t1.status = 0
+        limit 1
+    </select>
+
 </mapper>
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