diff --git a/IRaCIS.Core.Domain/Trial/Trial.cs b/IRaCIS.Core.Domain/Trial/Trial.cs
index 41799a768..d685f71d5 100644
--- a/IRaCIS.Core.Domain/Trial/Trial.cs
+++ b/IRaCIS.Core.Domain/Trial/Trial.cs
@@ -170,7 +170,7 @@ public partial class Trial : BaseFullDeleteAuditEntity
     [Comment("阅片方式")]
     public int ReadingMode { get; set; } = 1;
 
-    public int ChangeDefalutDays { get; set; } = 5;
+    public int ChangeDefalutDays { get; set; } = 7;
 
     [Comment("跨项目复制")]
     public bool IsImageReplicationAcrossTrial { get; set; } = false;