diff --git a/klp-wms/src/main/java/com/klp/service/impl/WmsStockIoDetailServiceImpl.java b/klp-wms/src/main/java/com/klp/service/impl/WmsStockIoDetailServiceImpl.java
index 0210512f..ff2013f7 100644
--- a/klp-wms/src/main/java/com/klp/service/impl/WmsStockIoDetailServiceImpl.java
+++ b/klp-wms/src/main/java/com/klp/service/impl/WmsStockIoDetailServiceImpl.java
@@ -7,6 +7,10 @@ import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.toolkit.Wrappers;
 import com.klp.common.utils.StringUtils;
+import com.klp.domain.WmsProduct;
+import com.klp.domain.WmsRawMaterial;
+import com.klp.mapper.WmsProductMapper;
+import com.klp.mapper.WmsRawMaterialMapper;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -37,6 +41,8 @@ public class WmsStockIoDetailServiceImpl implements IWmsStockIoDetailService {
 
     private final WmsStockIoDetailMapper baseMapper;
     private final WmsStockIoMapper stockIoMapper;
+    private final WmsProductMapper productMapper;
+    private final WmsRawMaterialMapper rawMaterialMapper;
 
     /**
      * 查询出入库单明细
@@ -102,7 +108,19 @@ public class WmsStockIoDetailServiceImpl implements IWmsStockIoDetailService {
         if (stockIo != null && stockIo.getStatus() >= 2) {
             throw new ServiceException("已审核的单据不能修改明细");
         }
-
+        // 如果unit为空，自动查item表补全（新增逻辑）
+        String unit = bo.getUnit();
+        if (unit == null || unit.trim().isEmpty()) {
+            if ("product".equals(bo.getItemType())) {
+                WmsProduct p = productMapper.selectById(bo.getItemId());
+                unit = p != null ? p.getUnit() : null;
+            } else if ("raw_material".equals(bo.getItemType())) {
+                WmsRawMaterial r = rawMaterialMapper.selectById(bo.getItemId());
+                unit = r != null ? r.getUnit() : null;
+            }
+        }
+        // 将获取到的unit设置回bo对象
+        bo.setUnit(unit);
         WmsStockIoDetail add = BeanUtil.toBean(bo, WmsStockIoDetail.class);
         validEntityBeforeSave(add);
         boolean flag = baseMapper.insert(add) > 0;