diff --git a/jeecg-boot/jeecg-boot-module-system/src/main/java/org/jeecg/modules/productplan/service/impl/IZyProductPlanAutoServiceImpl.java b/jeecg-boot/jeecg-boot-module-system/src/main/java/org/jeecg/modules/productplan/service/impl/IZyProductPlanAutoServiceImpl.java
index f5103093..aebe0b79 100644
--- a/jeecg-boot/jeecg-boot-module-system/src/main/java/org/jeecg/modules/productplan/service/impl/IZyProductPlanAutoServiceImpl.java
+++ b/jeecg-boot/jeecg-boot-module-system/src/main/java/org/jeecg/modules/productplan/service/impl/IZyProductPlanAutoServiceImpl.java
@@ -454,22 +454,24 @@ public class IZyProductPlanAutoServiceImpl extends ServiceImpl<ZyProductPlanMapp
     private IZyDeviceService iZyDeviceService;
 
     ZyPlanProcess diffMachine(ZyPlanProcess zyPlanProcess, List<String> zyProcessMachineIds, List<String> zyProcessCodes, List<Station> stationList) {
-        for (int j = 0; j < stationList.size(); j++) {
-            Station station = stationList.get(j);
-            List<StationMachine> stationMachineList = iStationMachineService.list(new LambdaQueryWrapper<StationMachine>().eq(StationMachine::getStationId, station.getId()));
-            //工位设备ids
-            List<String> stationMachineIds = Optional.ofNullable(stationMachineList).orElse(new ArrayList<>()).stream().map(StationMachine::getMachineId).collect(Collectors.toList());
-            List<ZyDevice> zyDeviceList = iZyDeviceService.list(new LambdaQueryWrapper<ZyDevice>().in(ZyDevice::getId, stationMachineIds));
-            List<String> zyDevice_typeCodes = Optional.ofNullable(zyDeviceList).orElse(new ArrayList<>()).stream().map(ZyDevice::getTypeCode).collect(Collectors.toList());
-            // 工位设备包含工序设备即匹配成功
-            if (zyDevice_typeCodes.containsAll(zyProcessCodes)) {
-                String machineIds = zyProcessMachineIds.stream().collect(Collectors.joining(","));
-                zyPlanProcess.setMachineIds(machineIds);
-                zyPlanProcess.setMachineNames(iStationMachineService.convertByMachineIds(zyProcessMachineIds));
-                zyPlanProcess.setStationId(station.getId());
-                zyPlanProcess.setStationName(station.getStationName());
-                zyPlanProcess.setStationNum(station.getStationNum());
-                return zyPlanProcess;
+        if (!ObjectUtils.isEmpty(zyProcessCodes) && !ObjectUtils.isEmpty(zyProcessMachineIds)) {
+            for (int j = 0; j < stationList.size(); j++) {
+                Station station = stationList.get(j);
+                List<StationMachine> stationMachineList = iStationMachineService.list(new LambdaQueryWrapper<StationMachine>().eq(StationMachine::getStationId, station.getId()));
+                //工位设备ids
+                List<String> stationMachineIds = Optional.ofNullable(stationMachineList).orElse(new ArrayList<>()).stream().map(StationMachine::getMachineId).collect(Collectors.toList());
+                List<ZyDevice> zyDeviceList = iZyDeviceService.list(new LambdaQueryWrapper<ZyDevice>().in(ZyDevice::getId, stationMachineIds));
+                List<String> zyDevice_typeCodes = Optional.ofNullable(zyDeviceList).orElse(new ArrayList<>()).stream().map(ZyDevice::getTypeCode).collect(Collectors.toList());
+                // 工位设备包含工序设备即匹配成功
+                if (zyDevice_typeCodes.containsAll(zyProcessCodes)) {
+                    String machineIds = zyProcessMachineIds.stream().collect(Collectors.joining(","));
+                    zyPlanProcess.setMachineIds(machineIds);
+                    zyPlanProcess.setMachineNames(iStationMachineService.convertByMachineIds(zyProcessMachineIds));
+                    zyPlanProcess.setStationId(station.getId());
+                    zyPlanProcess.setStationName(station.getStationName());
+                    zyPlanProcess.setStationNum(station.getStationNum());
+                    return zyPlanProcess;
+                }
             }
         }
         return null;