diff --git a/mailbox-lan/src/main/java/com/biutag/lan/service/MailService.java b/mailbox-lan/src/main/java/com/biutag/lan/service/MailService.java
index dd2e549..cc75657 100644
--- a/mailbox-lan/src/main/java/com/biutag/lan/service/MailService.java
+++ b/mailbox-lan/src/main/java/com/biutag/lan/service/MailService.java
@@ -419,13 +419,16 @@ public class MailService extends ServiceImpl<MailMapper, Mail> {
             }
         } else {
             // 市局
-            workService.update(new LambdaUpdateWrapper<Work>().eq(Work::getSignDeptId, mail.getFirstDeptId())
+            workService.update(new LambdaUpdateWrapper<Work>()
+                    .eq(Work::getMailId, mailId)
+                    .eq(Work::getSignDeptId, mail.getFirstDeptId())
                     .eq(Work::getSignRoleId, RoleEnum.MUNICIPAL_DEPT_CLASSES.getRoleId())
                     .set(Work::getWorkState, Work.State.done.name())
                     .set(Work::getWorkType, WorkType.processing.name()));
             if (!returnFlag) {
                 // 市局
                 workService.update(new LambdaUpdateWrapper<Work>()
+                        .eq(Work::getMailId, mailId)
                         .eq(Work::getSignDeptId, mail.getThreeDeptId())
                         .eq(Work::getSignRoleId, RoleEnum.THREE_DEPT_CLASSES.getRoleId())
                         .eq(Work::getMainDeptFlag, true)