diff --git a/WGShare.API/Controllers/Frontend/RoomController.cs b/WGShare.API/Controllers/Frontend/RoomController.cs
index d540e62..491c4ae 100644
--- a/WGShare.API/Controllers/Frontend/RoomController.cs
+++ b/WGShare.API/Controllers/Frontend/RoomController.cs
@@ -681,6 +681,25 @@ namespace WGShare.API.Controllers.Frontend
             await _hubContext.Clients.Group(roomNum).ShowUser(UId, UserName, string.Empty, string.Empty);
         }
 
+        /// <summary>
+        /// 共享人取消共享屏幕
+        /// </summary>
+        /// <returns></returns>
+        [HttpPost("stop-shared-screen")]
+        public async Task StopedSharedScreen([FromQuery] string roomNum)
+        {
+            if (RedisHelper.Instance.HGet(RedisKeyConstant.SessionManage.GetChannelShowUserKey(TenantId), roomNum) != ScreenShareId)
+            {
+                // 不是共享屏幕的人，不做处理
+                return;
+            }
+
+            // 设置新的共享屏幕
+            RedisHelper.Instance.HSet(RedisKeyConstant.SessionManage.GetChannelShowUserKey(TenantId), roomNum, UId);
+
+            await _hubContext.Clients.Group(roomNum).StopedSharedScreen(ScreenShareId);
+        }
+
         #region 文件分享
         /// <summary>
         /// 分享上传文件
diff --git a/WGShare.API/Hubs/IMessageClient.cs b/WGShare.API/Hubs/IMessageClient.cs
index 3095936..8aa358d 100644
--- a/WGShare.API/Hubs/IMessageClient.cs
+++ b/WGShare.API/Hubs/IMessageClient.cs
@@ -61,6 +61,12 @@ namespace WGShare.API.Hubs
         /// <returns></returns>
         Task ShowUser(string uid, string uname, string operUid, string operUserName);
 
+        /// <summary>
+        /// 共享人取消共享屏幕
+        /// </summary>
+        /// <returns></returns>
+        Task StopedSharedScreen(string ScreenShareId);
+
         /// <summary>
         /// 用户加入频道回调
         /// </summary>