diff --git a/src/main/java/com/biutag/supervision/service/DataMailService.java b/src/main/java/com/biutag/supervision/service/DataMailService.java
index 858d2b5..e1e0509 100644
--- a/src/main/java/com/biutag/supervision/service/DataMailService.java
+++ b/src/main/java/com/biutag/supervision/service/DataMailService.java
@@ -70,7 +70,7 @@ public class DataMailService extends ServiceImpl<DataPetitionComplaintMapper, Da
         // 局长信箱
         QueryWrapper<Mail> mailQueryWrapper = new QueryWrapper<>();
         mailQueryWrapper.ne("mail_state", VALID_SIGN);
-        mailQueryWrapper.between("create_time", beginTime, endTime);
+        mailQueryWrapper.between("mail_time", beginTime, endTime);
         Long mailCount = mailMapper.selectCount(mailQueryWrapper);
 
         temp.setCountryMail(countryMail);