diff --git a/mhd_wms/src/main/java/com/mhd/wms/domain/outMaterialDetail/repository/persistence/OutMaterialDetailImpl.java b/mhd_wms/src/main/java/com/mhd/wms/domain/outMaterialDetail/repository/persistence/OutMaterialDetailImpl.java
index 87cb83a4d..0864d47a8 100644
--- a/mhd_wms/src/main/java/com/mhd/wms/domain/outMaterialDetail/repository/persistence/OutMaterialDetailImpl.java
+++ b/mhd_wms/src/main/java/com/mhd/wms/domain/outMaterialDetail/repository/persistence/OutMaterialDetailImpl.java
@@ -289,8 +289,8 @@ public class OutMaterialDetailImpl extends ServiceImpl<OutMaterialDetailMapper,
                     outMaterialDetailChild.setCreateBy(loginUser.getUserid());
                     outMaterialDetailChild.setCreateByName(loginUser.getUsername());
                     outMaterialDetailChild.setCreateTime(new Date());
-                    BigDecimal allocationQuantity = outMaterialDetailChild.getAllocationQuantity();
-                    BigDecimal alreadyAllocationQuantity = outMaterialDetailChild.getAlreadyAllocationQuantity();
+                    BigDecimal allocationQuantity = outMaterialDetailChild.getAllocationQuantity() != null ? outMaterialDetailChild.getAllocationQuantity() : BigDecimal.ZERO;
+                    BigDecimal alreadyAllocationQuantity = outMaterialDetailChild.getAlreadyAllocationQuantity() != null ? outMaterialDetailChild.getAlreadyAllocationQuantity() : BigDecimal.ZERO;
                     BigDecimal nowAllocationQuantity = allocationQuantity.subtract(alreadyAllocationQuantity);
                     outMaterialDetailChild.setNowAllocationQuantity(nowAllocationQuantity);
                     outMaterialDetailListChild.add(outMaterialDetailChild);