diff --git a/src/com/engine/salary/formlua/func/date/DateTimeServiceImpl.java b/src/com/engine/salary/formlua/func/date/DateTimeServiceImpl.java
index 5f2ffedd0..51178fcb8 100644
--- a/src/com/engine/salary/formlua/func/date/DateTimeServiceImpl.java
+++ b/src/com/engine/salary/formlua/func/date/DateTimeServiceImpl.java
@@ -164,7 +164,7 @@ public class DateTimeServiceImpl implements DateTimeService {
         boolean checkType = true;
         switch (type) {
             case "Y":
-                time = DateTimeServiceImpl.getTime(startDate, endDate) / (nd.doubleValue()) / 365.0;
+                time = DateTimeServiceImpl.getTime(startDate, endDate) / (nd.doubleValue()) / 365.25;
                 break;
             case "M":
                 Long monthR = DateTimeServiceImpl.getByField(cal1, cal2, Calendar.YEAR) * 12 + DateTimeServiceImpl.getByField(cal1, cal2, Calendar.MONTH);
@@ -194,7 +194,7 @@ public class DateTimeServiceImpl implements DateTimeService {
             return new DataType(DataType.STRING, "");
         }
         BigDecimal b = new BigDecimal(time);
-        double f1 = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
+        double f1 = b.setScale(2, BigDecimal.ROUND_DOWN).doubleValue();
         result = f1;
         return new DataType(DataType.NUMBER, result);
     }
@@ -1168,10 +1168,10 @@ public class DateTimeServiceImpl implements DateTimeService {
         Long secondsL = null;
         switch (type) {
             case "Y":
-                secondsL = (long) (365 * 24 * 60 * 60 * 1000);
+                secondsL = (long) (365.25 * 24 * 60 * 60 * 1000);
                 break;
             case "M":
-                secondsL = (long) (30 * 24 * 60 * 60 * 1000);
+                secondsL = (long) (30.4375 * 24 * 60 * 60 * 1000);
                 break;
             case "D":
                 secondsL = (long) (24 * 60 * 60 * 1000);
@@ -1318,7 +1318,7 @@ public class DateTimeServiceImpl implements DateTimeService {
         double resutl;
         switch (returnPattern) {
             case "Y":
-                resutl = DateTimeServiceImpl.getTime(beginDate, endDate) / (24 * 60 * 60 * 1000) / 365.0;
+                resutl = DateTimeServiceImpl.getTime(beginDate, endDate) / (24 * 60 * 60 * 1000) / 365.25;
                 break;
             case "M":
                 resutl = DateTimeServiceImpl.getByField(beginCalendar, endCalendar, Calendar.YEAR) * 12 + DateTimeServiceImpl.getByField(beginCalendar, endCalendar, Calendar.MONTH);