diff --git a/PEIS/View/Enrollment/EnrollmentOrgForm.cs b/PEIS/View/Enrollment/EnrollmentOrgForm.cs
index 00927a6..a9bb60d 100644
--- a/PEIS/View/Enrollment/EnrollmentOrgForm.cs
+++ b/PEIS/View/Enrollment/EnrollmentOrgForm.cs
@@ -202,7 +202,7 @@ namespace PEIS.View.Enrollment
 
         private void EnrollmentOrgForm_Shown(object sender, EventArgs e)
         {
-            DtpBegDate.Value = DateTime.Now.AddDays(-15);
+            DtpBegDate.Value = DateTime.Now.AddDays(-30);
             DtpEndDate.Value = DateTime.Now;
             RiCmbExamType.Items.Add("已婚/未婚");
             RiCmbExamType.Items.AddRange(Global._lstConfig.Where(a => a.Key.Equals("ExamType")).ToList().Select(a => a.Value).ToList());