diff --git a/src/DotNetCore.CAP/CAP.Options.cs b/src/DotNetCore.CAP/CAP.Options.cs
index 3196c1e..d6cd441 100644
--- a/src/DotNetCore.CAP/CAP.Options.cs
+++ b/src/DotNetCore.CAP/CAP.Options.cs
@@ -23,7 +23,7 @@ namespace DotNetCore.CAP
         /// <summary>
         /// Default successed message expriation timespan, in seconds.
         /// </summary>
-        public const int DefaultSuccessMessageExpirationTimeSpan = 3600;
+        public const int DefaultSuccessMessageExpirationAfter = 3600;
 
         /// <summary>
         /// Failed message retry waiting interval.
@@ -34,7 +34,7 @@ namespace DotNetCore.CAP
         {
             PollingDelay = DefaultPollingDelay;
             QueueProcessorCount = DefaultQueueProcessorCount;
-            SuccessedMessageExpiredTimeSpan = DefaultSuccessMessageExpirationTimeSpan;
+            SuccessedMessageExpiredAfter = DefaultSuccessMessageExpirationAfter;
             FailedMessageWaitingInterval = DefaultFailedMessageWaitingInterval;
             Extensions = new List<ICapOptionsExtension>();
         }
@@ -52,10 +52,10 @@ namespace DotNetCore.CAP
         public int QueueProcessorCount { get; set; }
 
         /// <summary>
-        /// Sent or received successed message due timespan, then the message will be deleted at due time. 
+        /// Sent or received successed message after timespan of due, then the message will be deleted at due time. 
         /// Dafault is 3600 seconds.
         /// </summary>
-        public int SuccessedMessageExpiredTimeSpan { get; set; }
+        public int SuccessedMessageExpiredAfter { get; set; }
 
         /// <summary>
         /// Failed messages polling delay time.
diff --git a/src/DotNetCore.CAP/IQueueExecutor.Publish.Base.cs b/src/DotNetCore.CAP/IQueueExecutor.Publish.Base.cs
index 9d5baab..e7274a8 100644
--- a/src/DotNetCore.CAP/IQueueExecutor.Publish.Base.cs
+++ b/src/DotNetCore.CAP/IQueueExecutor.Publish.Base.cs
@@ -58,7 +58,7 @@ namespace DotNetCore.CAP
                 }
                 else
                 {
-                    newState = new SucceededState(_options.SuccessedMessageExpiredTimeSpan);
+                    newState = new SucceededState(_options.SuccessedMessageExpiredAfter);
                 }
                 await _stateChanger.ChangeStateAsync(message, newState, connection);
 
diff --git a/src/DotNetCore.CAP/IQueueExecutor.Subscibe.cs b/src/DotNetCore.CAP/IQueueExecutor.Subscibe.cs
index adcfd7a..a1f6956 100644
--- a/src/DotNetCore.CAP/IQueueExecutor.Subscibe.cs
+++ b/src/DotNetCore.CAP/IQueueExecutor.Subscibe.cs
@@ -64,7 +64,7 @@ namespace DotNetCore.CAP
                 }
                 else
                 {
-                    newState = new SucceededState(_options.SuccessedMessageExpiredTimeSpan);
+                    newState = new SucceededState(_options.SuccessedMessageExpiredAfter);
                 }
                 await _stateChanger.ChangeStateAsync(message, newState, connection);