diff --git a/QCloudCSharpSDK/COSXML/Model/Object/RestoreObjectRequest.cs b/QCloudCSharpSDK/COSXML/Model/Object/RestoreObjectRequest.cs
index 73febd1..a6f1468 100644
--- a/QCloudCSharpSDK/COSXML/Model/Object/RestoreObjectRequest.cs
+++ b/QCloudCSharpSDK/COSXML/Model/Object/RestoreObjectRequest.cs
@@ -4,6 +4,7 @@
 using System.Text;
 using COSXML.Model.Tag;
 using COSXML.Common;
+using COSXML.CosException;
 using COSXML.Network;
 
 namespace COSXML.Model.Object
@@ -27,6 +28,7 @@ public RestoreObjectRequest(string bucket, string key)
             this.queryParameters.Add("restore", null);
             restoreConfigure = new RestoreConfigure();
             restoreConfigure.casJobParameters = new RestoreConfigure.CASJobParameters();
+            restoreConfigure.days = 0;
         }
 
         /// <summary>
@@ -35,12 +37,10 @@ public RestoreObjectRequest(string bucket, string key)
         /// <param name="days"></param>
         public void SetExpireDays(int days)
         {
-
-            if (days < 0)
+            if (days <= 0)
             {
-                days = 0;
+                throw new CosClientException(-1, "param 'Days' ranges from 1-365, Some storage types do not need call SetExpireDays function to set Days param");
             }
-
             restoreConfigure.days = days;
         }
 
@@ -65,6 +65,12 @@ public void SetVersionId(string versionId)
 
         public override Network.RequestBody GetRequestBody()
         {
+            if (restoreConfigure.days == 0)
+            {
+                RestoreConfigureNoDays restoreConfigureNoDays = new RestoreConfigureNoDays();
+                restoreConfigureNoDays.casJobParameters = restoreConfigure.casJobParameters;
+                return GetXmlRequestBody(restoreConfigureNoDays);
+            }
             return GetXmlRequestBody(restoreConfigure);
         }
     }
diff --git a/QCloudCSharpSDK/COSXML/Model/Tag/RestoreConfigure.cs b/QCloudCSharpSDK/COSXML/Model/Tag/RestoreConfigure.cs
index c3a118c..ddb90dc 100644
--- a/QCloudCSharpSDK/COSXML/Model/Tag/RestoreConfigure.cs
+++ b/QCloudCSharpSDK/COSXML/Model/Tag/RestoreConfigure.cs
@@ -45,4 +45,17 @@ public enum Tier
             Bulk
         }
     }
+    
+    [XmlRoot("RestoreRequest")]
+    public sealed class RestoreConfigureNoDays
+    {
+        /// <summary>
+        /// 归档存储工作参数配置
+        /// <see href="CASJobParameters"/>
+        /// </summary>
+        [XmlElement("CASJobParameters")]
+        public RestoreConfigure.CASJobParameters casJobParameters;
+    }
+    
+    
 }
diff --git a/QCloudCSharpSDK/COSXMLDemo/MainProcess.cs b/QCloudCSharpSDK/COSXMLDemo/MainProcess.cs
index 7026aaa..ea73327 100644
--- a/QCloudCSharpSDK/COSXMLDemo/MainProcess.cs
+++ b/QCloudCSharpSDK/COSXMLDemo/MainProcess.cs
@@ -13,7 +13,10 @@ static void Main(string[] args)
 
             public void DoSomething()
             {
-    
+                // BucketPolicyModel.BucketPolicyMain();
+                // DownloadObject.DownloadObjectMain();
+                // UploadObject.UploadObjectMain();
+
                 // BucketPolicyModel.BucketPolicyMain();
                 // DownloadObject.DownloadObjectMain();
                 UploadObject.UploadObjectMain();
@@ -40,13 +43,16 @@ public void DoSomething()
                 // BucketReplicationModel.BucketReplicationMain();
                 // BucketLoggingModel.BucketLoggingMain();
 
+
                 // BucketTaggingModel.BucketTaggingMain();
 
+
                 // ObjectTaggingModel.ObjectTaggingMain();
                 // BucketInventoryModel.BucketInventoryMain();
                 // BucketDomainModel.BucketDomainMain();
                 // PutObjectACLModel.PutObjectACLMain();//
                 // BucketRefererModel.BucketRefererMain();//
+
                 // BucketWebsiteModel.BucketWebsiteMain();
 
             }
diff --git a/QCloudCSharpSDK/COSXMLDemo/Object/ObjectRestore.cs b/QCloudCSharpSDK/COSXMLDemo/Object/ObjectRestore.cs
index 98950a7..26eb4e9 100644
--- a/QCloudCSharpSDK/COSXMLDemo/Object/ObjectRestore.cs
+++ b/QCloudCSharpSDK/COSXMLDemo/Object/ObjectRestore.cs
@@ -45,6 +45,7 @@ public void RestoreObject()
                 string key = "exampleObject"; //对象键
                 RestoreObjectRequest request = new RestoreObjectRequest(bucket, key);
                 //恢复时间
+                request.SetExpireDays(3); //https://cloud.tencent.com/document/product/436/12633
                 request.SetExpireDays(3);
                 request.SetTier(COSXML.Model.Tag.RestoreConfigure.Tier.Bulk);
                 //执行请求
diff --git a/QCloudCSharpSDK/COSXMLTests/ObjectTest.cs b/QCloudCSharpSDK/COSXMLTests/ObjectTest.cs
index 45b042c..ef001e9 100644
--- a/QCloudCSharpSDK/COSXMLTests/ObjectTest.cs
+++ b/QCloudCSharpSDK/COSXMLTests/ObjectTest.cs
@@ -1071,8 +1071,13 @@ public void RestoreObject()
                 cosXml.PutObject(putRequest);
 
                 RestoreObjectRequest request = new RestoreObjectRequest(bucket, objectKey);
-                //恢复时间
-                request.SetExpireDays(-1);
+                //恢复时间,时间参数在1-365内
+                try {
+                    request.SetExpireDays(-1); }
+                catch (COSXML.CosException.CosClientException clientEx) {
+                    Assert.True(true);
+                }
+                
                 request.SetExpireDays(3);
                 request.SetTier(COSXML.Model.Tag.RestoreConfigure.Tier.Standard);
 
@@ -1100,6 +1105,44 @@ public void RestoreObject()
                 Assert.Fail();
             }
         }
+        
+        
+        [Test()]
+        public void RestoreObjectNoDaysParam()
+        {
+            
+            
+            string objectKey = "archive_object";
+            try
+            {
+                byte[] data = File.ReadAllBytes(smallFileSrcPath);
+                PutObjectRequest putRequest = new PutObjectRequest(bucket, objectKey, data);
+                putRequest.SetCosStorageClass("DEEP_ARCHIVE");
+                cosXml.PutObject(putRequest);
+                RestoreObjectRequest request = new RestoreObjectRequest(bucket, objectKey);
+                request.SetTier(COSXML.Model.Tag.RestoreConfigure.Tier.Standard);
+
+                //执行请求,该请求不设置Days参数
+                RestoreObjectResult result = cosXml.RestoreObject(request);
+                Assert.True(result.IsSuccessful());
+                request.SetVersionId("null");
+                DeleteObjectRequest deleteRequest = new DeleteObjectRequest(bucket, objectKey);
+                deleteRequest.SetVersionId("null");
+                DeleteObjectResult deleteObjectResult = cosXml.DeleteObject(deleteRequest);
+                Assert.True(deleteObjectResult.IsSuccessful());
+            }
+            catch (COSXML.CosException.CosClientException clientEx)
+            {
+                Console.WriteLine("CosClientException: " + clientEx.Message);
+                Assert.Fail();
+            }
+            catch (COSXML.CosException.CosServerException serverEx)
+            {
+                Console.WriteLine("CosServerException: " + serverEx.GetInfo());
+                Assert.Fail();
+            }
+        }
+        
 
         [Test()]
         public void PostObject()