diff --git a/IRaCIS.Core.Domain/BaseModel/Entity.cs b/IRaCIS.Core.Domain/BaseModel/Entity.cs
index 939bf9f13..8482a17d4 100644
--- a/IRaCIS.Core.Domain/BaseModel/Entity.cs
+++ b/IRaCIS.Core.Domain/BaseModel/Entity.cs
@@ -17,4 +17,52 @@ namespace IRaCIS.Core.Domain.Models
         abstract TKey Id { get; set; }
     }
 
+    #region 减少实体属性，增加基类
+
+    public abstract class BaseAuditAddEntity : Entity, IAuditAdd
+    {
+
+        public Guid CreateUserId { get; set; }
+        public DateTime CreateTime { get; set; }
+    }
+
+    public abstract class BaseFullAuditEntity : Entity, IAuditUpdate, IAuditAdd
+    {
+        public Guid CreateUserId { get; set; }
+        public DateTime CreateTime { get; set; }
+        public Guid UpdateUserId { get; set; }
+        public DateTime UpdateTime { get; set; }
+    }
+
+
+    public abstract class BaseFullAuditDeleteEntity : Entity, IAuditUpdate, IAuditAdd, ISoftDelete
+    {
+        public Guid? DeleteUserId { get; set; }
+        public bool IsDeleted { get; set; }
+        public DateTime? DeletedTime { get; set; }
+        public Guid CreateUserId { get; set; }
+        public DateTime CreateTime { get; set; }
+        public Guid UpdateUserId { get; set; }
+        public DateTime UpdateTime { get; set; }
+    }
+
+
+
+    public abstract class BaseAuditAddEntityWithUserName : Entity, IAuditAddWithUserName
+    {
+        public string CreateUser { get; set; }
+
+        public Guid CreateUserId { get; set; }
+        public DateTime CreateTime { get; set; }
+    }
+
+    public abstract class BaseAuditUpdateEntity : Entity, IAuditUpdate
+    {
+        public Guid UpdateUserId { get; set; }
+        public DateTime UpdateTime { get; set; }
+    }
+
+
+    #endregion
+
 }
diff --git a/IRaCIS.Core.Domain/BaseModel/IAuditAdd.cs b/IRaCIS.Core.Domain/BaseModel/IAuditAdd.cs
index 70cd25e2b..4786c8e6d 100644
--- a/IRaCIS.Core.Domain/BaseModel/IAuditAdd.cs
+++ b/IRaCIS.Core.Domain/BaseModel/IAuditAdd.cs
@@ -19,7 +19,9 @@ namespace IRaCIS.Core.Domain.Models
 
     public interface IAuditAddWithUserName : IAuditAdd<Guid>
     {
-        string CreateUser { get; set; }
+        public string CreateUser { get; set; }
     }
 
+
+
 }
diff --git a/IRaCIS.Core.Domain/BaseModel/IAuditUpdate.cs b/IRaCIS.Core.Domain/BaseModel/IAuditUpdate.cs
index e154ccecc..05d422a16 100644
--- a/IRaCIS.Core.Domain/BaseModel/IAuditUpdate.cs
+++ b/IRaCIS.Core.Domain/BaseModel/IAuditUpdate.cs
@@ -5,7 +5,6 @@ namespace IRaCIS.Core.Domain.Models
     public interface IAuditUpdate<TKey> where TKey : struct
     {
         public TKey UpdateUserId { get; set; }
-        //string UpdateUserName { get; set; }
         public DateTime UpdateTime { get; set; }
     }
 
@@ -13,4 +12,9 @@ namespace IRaCIS.Core.Domain.Models
     {
 
     }
+
+
+
+
+
 }
diff --git a/IRaCIS.Core.Domain/BaseModel/ISoftDelete.cs b/IRaCIS.Core.Domain/BaseModel/ISoftDelete.cs
index 8cfa535b1..e0549348b 100644
--- a/IRaCIS.Core.Domain/BaseModel/ISoftDelete.cs
+++ b/IRaCIS.Core.Domain/BaseModel/ISoftDelete.cs
@@ -2,16 +2,18 @@
 
 namespace IRaCIS.Core.Domain.Models
 {
-
-
-    public interface ISoftDelete
+    public interface ISoftDelete<TKey> where TKey : struct
     {
-        bool IsDeleted { get; set; }
+        public TKey? DeleteUserId { get; set; }
+        public bool IsDeleted { get; set; }
 
         public DateTime? DeletedTime { get; set; }
-
-        public Guid? DeleteUserId { get; set; }
     }
 
-    
+    public interface ISoftDelete : ISoftDelete<Guid>
+    {
+
+    }
+
+
 }
diff --git a/IRaCIS.Core.Domain/Common/CommonDocument.cs b/IRaCIS.Core.Domain/Common/CommonDocument.cs
index 37a29aeee..579fb3da8 100644
--- a/IRaCIS.Core.Domain/Common/CommonDocument.cs
+++ b/IRaCIS.Core.Domain/Common/CommonDocument.cs
@@ -9,82 +9,30 @@ using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 namespace IRaCIS.Core.Domain.Models
 {
-	 ///<summary>
-	 ///CommonDocument
-	 ///</summary>
-	 [Table("CommonDocument")]	
-	 public class CommonDocument : Entity, IAuditUpdate, IAuditAdd,ISoftDelete
-	 {
+    ///<summary>
+    ///CommonDocument
+    ///</summary>
+    [Table("CommonDocument")]
+    public class CommonDocument : BaseFullAuditDeleteEntity
+    {
+
+        public string Code { get; set; } = String.Empty;
 
 
-		[Required]
-		public string Code { get; set; } = String.Empty;
+        public string Name { get; set; } = String.Empty;
 
-		[Required]
-		public string Name { get; set; } = String.Empty;
+        public string NameCN { get; set; } = string.Empty;
 
-		public string NameCN { get; set; } = string.Empty;
-
-		/// <summary>
-		/// Path
-		/// </summary>
-		[Required]
-		public string Path { get; set; } = String.Empty;
-
-		/// <summary>
-		/// CreateTime
-		/// </summary>
-		[Required]
-		public DateTime CreateTime { get; set; }
-	
-		/// <summary>
-        /// CreateUserId
-        /// </summary>
-		[Required]
-		public Guid CreateUserId { get; set; }
-	
-		/// <summary>
-        /// UpdateTime
-        /// </summary>
-		[Required]
-		public DateTime UpdateTime { get; set; }
-	
-		/// <summary>
-        /// UpdateUserId
-        /// </summary>
-		[Required]
-		public Guid UpdateUserId { get; set; }
-
-		/// <summary>
-		/// Description
-		/// </summary>
-		[Required]
-		public string Description { get; set; } = String.Empty;
-	
-		/// <summary>
-        /// IsDeleted
-        /// </summary>
-		[Required]
-		public bool IsDeleted { get; set; }
-
-		public DateTime? DeletedTime { get; set; }
-
-		public Guid? DeleteUserId { get; set; }
+        public string Path { get; set; } = String.Empty;
 
 
-		public CriterionType? CriterionTypeEnum { get; set; }
-		public CommonDocumentFileType FileTypeEnum { get; set; }	
-		public EmailBusinessScenario BusinessScenarioEnum { get; set; }
+        public string Description { get; set; } = String.Empty;
+
+        public CriterionType? CriterionTypeEnum { get; set; }
+        public CommonDocumentFileType FileTypeEnum { get; set; }
+        public EmailBusinessScenario BusinessScenarioEnum { get; set; }
 
 
-		//[Required]
-		//public Guid FileTypeId { get; set; }	
-		//public Guid ModuleTypeId { get; set; }
+    }
 
-
-		//public Dictionary FileType { get; set; }
-		//public Dictionary ModuleType { get; set; }
-
-	}
-
-}	 
+}