diff --git a/mhd_wms/src/main/java/com/mhd/wms/application/service/pickingOrder/PickingOrderApplicationService.java b/mhd_wms/src/main/java/com/mhd/wms/application/service/pickingOrder/PickingOrderApplicationService.java
index 22a2338ea..c6049a450 100644
--- a/mhd_wms/src/main/java/com/mhd/wms/application/service/pickingOrder/PickingOrderApplicationService.java
+++ b/mhd_wms/src/main/java/com/mhd/wms/application/service/pickingOrder/PickingOrderApplicationService.java
@@ -69,7 +69,52 @@ public class PickingOrderApplicationService {
             AssociationWarehouseCacheDO associationWarehouseCacheDO = SystemServiceCacheUtil.getAssociationWarehouseCache(loginUser.getUserid());
             pickingOrderDO.setWarehouseId(associationWarehouseCacheDO.getWarehouseId());
         }
-        return pickingOrderDomainService.queryList(pickingOrderDO);
+        List<PickingOrderPO> pickingOrderPOList = pickingOrderDomainService.queryList(pickingOrderDO);
+        
+        // 重新计算物料种类数：按料号去重，一个料号算一种物料
+        if (!CollectionUtils.isEmpty(pickingOrderPOList)) {
+            // 收集所有拣货单号
+            List<String> pickingOrderNumbers = pickingOrderPOList.stream()
+                    .map(PickingOrderPO::getPickingOrderNumber)
+                    .filter(Objects::nonNull)
+                    .filter(number -> !number.trim().isEmpty())
+                    .collect(Collectors.toList());
+            
+            if (!pickingOrderNumbers.isEmpty()) {
+                // 批量查询所有拣货单的物料明细（循环查询每个拣货单的物料明细）
+                Map<String, List<PickingMaterialDetailPO>> materialDetailsByOrderNumber = new HashMap<>();
+                for (String pickingOrderNumber : pickingOrderNumbers) {
+                    PickingMaterialDetailDO pickingMaterialDetailDO = new PickingMaterialDetailDO();
+                    pickingMaterialDetailDO.setPickingOrderNumber(pickingOrderNumber);
+                    List<PickingMaterialDetailPO> materialDetails = pickingMaterialDetailDomainService.queryList(pickingMaterialDetailDO);
+                    if (!CollectionUtils.isEmpty(materialDetails)) {
+                        materialDetailsByOrderNumber.put(pickingOrderNumber, materialDetails);
+                    }
+                }
+                
+                // 为每个拣货单计算物料种类数（按料号去重）
+                for (PickingOrderPO pickingOrderPO : pickingOrderPOList) {
+                    String pickingOrderNumber = pickingOrderPO.getPickingOrderNumber();
+                    if (pickingOrderNumber != null && materialDetailsByOrderNumber.containsKey(pickingOrderNumber)) {
+                        List<PickingMaterialDetailPO> materialDetails = materialDetailsByOrderNumber.get(pickingOrderNumber);
+                        // 按料号去重，计算物料种类数
+                        long materialQuantity = materialDetails.stream()
+                                .map(PickingMaterialDetailPO::getMaterialCode)
+                                .filter(Objects::nonNull)
+                                .filter(code -> !code.trim().isEmpty())
+                                .distinct()
+                                .count();
+                        pickingOrderPO.setMaterialQuantity((int) materialQuantity);
+                        log.debug("重新计算物料种类数 - 拣货单号: {}, 物料种类数: {}", pickingOrderNumber, materialQuantity);
+                    } else {
+                        // 如果没有物料明细，物料种类数为0
+                        pickingOrderPO.setMaterialQuantity(0);
+                    }
+                }
+            }
+        }
+        
+        return pickingOrderPOList;
     }