diff --git a/pc4mobx/hrmSalary/pages/ledgerPage/components/ledgerBaseSetting.js b/pc4mobx/hrmSalary/pages/ledgerPage/components/ledgerBaseSetting.js
index 63d31658..cfe0f90b 100644
--- a/pc4mobx/hrmSalary/pages/ledgerPage/components/ledgerBaseSetting.js
+++ b/pc4mobx/hrmSalary/pages/ledgerPage/components/ledgerBaseSetting.js
@@ -290,7 +290,7 @@ const initPeriodStr = (periodStrType, types, fromDay) => {
         str = `至上上月最后一天`;
       } else {
         tmpDate = moment(new Date(`${moment(tmpDate).format("YYYY-MM")}-0${fromDay}`))
-          .add(is_31H ? 30 : 29, "days");
+          .add(is_31H ? 30 : 27, "days");
         str = `至上月${moment(tmpDate).date()}号`;
       }
       break;
@@ -302,7 +302,7 @@ const initPeriodStr = (periodStrType, types, fromDay) => {
         str = `至上月最后一天`;
       } else {
         tmpDate = moment(new Date(`${moment(tmpDate).format("YYYY-MM")}-0${fromDay}`))
-          .add(is_31 ? 30 : 29, "days");
+          .add(is_31 ? 30 : 27, "days");
         str = `至本月${moment(tmpDate).date()}号`;
       }
       break;
@@ -314,7 +314,7 @@ const initPeriodStr = (periodStrType, types, fromDay) => {
         str = `至本月最后一天`;
       } else {
         tmpDate = moment(new Date(`${moment(tmpDate).format("YYYY-MM")}-0${fromDay}`))
-          .add(is_31K ? 30 : 29, "days");
+          .add(is_31K ? 30 : 27, "days");
         str = `至下月${moment(tmpDate).date()}号`;
       }
       break;