diff --git a/WGShare.API/Controllers/Frontend/RoomController.cs b/WGShare.API/Controllers/Frontend/RoomController.cs
index 470baaa..24b74fd 100644
--- a/WGShare.API/Controllers/Frontend/RoomController.cs
+++ b/WGShare.API/Controllers/Frontend/RoomController.cs
@@ -342,6 +342,23 @@ namespace WGShare.API.Controllers.Frontend
             await _hubContext.Clients.Groups(roomNum).RefreshView(type);
         }
 
+        /// <summary>
+        /// 全员观看
+        /// </summary>
+        /// <returns></returns>
+        [HttpGet("show-user")]
+        public async Task<string> GetShowUser([FromQuery] string roomNum)
+        {
+            var channelUsers = RedisHelper.HGetAll<ChannelUserInfo>(RedisKeyConstant.SessionManage.GetChannelUserKey(TenantId, roomNum));
+
+            if (channelUsers.IsNullOrEmpty())
+            {
+                throw Oops.Oh("无效会议号！");
+            }
+
+            return channelUsers.FirstOrDefault().Key;
+        }
+
         #region 文件分享
         /// <summary>
         /// 分享上传文件
diff --git a/WGShare.API/WGShare.API.xml b/WGShare.API/WGShare.API.xml
index 1d26a16..e86c5e7 100644
--- a/WGShare.API/WGShare.API.xml
+++ b/WGShare.API/WGShare.API.xml
@@ -157,6 +157,12 @@
             <param name="type"></param>
             <returns></returns>
         </member>
+        <member name="M:WGShare.API.Controllers.Frontend.RoomController.GetShowUser(System.String)">
+            <summary>
+            全员观看
+            </summary>
+            <returns></returns>
+        </member>
         <member name="M:WGShare.API.Controllers.Frontend.RoomController.AddFile(WGShare.Domain.DTOs.File.ShareFileInputDTO)">
             <summary>
             分享上传文件