diff --git a/jeecg-module-system/jeecg-system-biz/src/main/java/org/jeecg/modules/ocr/service/impl/OcrIdentifyServiceImpl.java b/jeecg-module-system/jeecg-system-biz/src/main/java/org/jeecg/modules/ocr/service/impl/OcrIdentifyServiceImpl.java
index 736b417..2062e4b 100644
--- a/jeecg-module-system/jeecg-system-biz/src/main/java/org/jeecg/modules/ocr/service/impl/OcrIdentifyServiceImpl.java
+++ b/jeecg-module-system/jeecg-system-biz/src/main/java/org/jeecg/modules/ocr/service/impl/OcrIdentifyServiceImpl.java
@@ -1223,8 +1223,8 @@ public class OcrIdentifyServiceImpl extends ServiceImpl<OcrIdentifyMapper, OcrId
 
     @Override
     public long calculateTimeDifference(String taskName) {
-        QueryWrapper<OcrIdentify> queryWrapper = new QueryWrapper<>();
-        queryWrapper.eq("taskName", taskName).orderByDesc("createTime").last("LIMIT 1");
+        LambdaQueryWrapper<OcrIdentify> queryWrapper = new LambdaQueryWrapper<>();
+        queryWrapper.eq(OcrIdentify::getTaskName, taskName).orderByDesc(OcrIdentify::getCreateTime).last("LIMIT 1");
         OcrIdentify lastIdentify = this.getOne(queryWrapper);
         if (lastIdentify != null) {
             Date lastCreateTime = lastIdentify.getCreateTime();