diff --git a/server/gameserver/player.h b/server/gameserver/player.h
index 8b30503..bacf92e 100644
--- a/server/gameserver/player.h
+++ b/server/gameserver/player.h
@@ -22,7 +22,6 @@ class Player : public Human
 
  public:
     int team_mode = 0;
-    int player_count = 0;
     bool auto_fill = false;
     bool use_touch = false;
     long long create_tick = 0;
diff --git a/server/gameserver/playermgr.cc b/server/gameserver/playermgr.cc
index c9cb7a6..9ae02b1 100644
--- a/server/gameserver/playermgr.cc
+++ b/server/gameserver/playermgr.cc
@@ -48,7 +48,6 @@ Player* PlayerMgr::CreatePlayerByCMJoin(long ip_saddr, int socket, const cs::CMJ
     hum->health = 0;
     hum->team_uuid = msg.team_uuid();
     hum->team_mode = msg.team_mode();
-    hum->player_count = msg.player_count();
     hum->auto_fill = msg.auto_fill();
     hum->use_touch = msg.use_touch();
     hum->avatar_url = msg.avatar_url();
diff --git a/server/tools/protobuild/cs_proto.proto b/server/tools/protobuild/cs_proto.proto
index 47cb6d4..f03880f 100755
--- a/server/tools/protobuild/cs_proto.proto
+++ b/server/tools/protobuild/cs_proto.proto
@@ -47,6 +47,12 @@ package cs;
   客户端可以根据protobuf反射得到字段名和字段id的对应关系做到自动化判断
 */
 
+//常量
+enum Constant_e
+{
+    ProtoVersion = 2019071501; //系统版本
+}
+
 //心跳
 message CMPing
 {
@@ -548,8 +554,8 @@ message CMJoin
     optional string team_uuid = 2; //队伍唯一id (没组队时为空字符串)
     optional string account_id = 3; //账号id account_id
     optional string session_id = 4; //session_id
+    optional int32 proto_version = 5; //协议版本号Constant_e.ProtoVersion
     optional int32 team_mode = 20; //队伍模式 0:单人 1:多人
-    optional int32 player_count = 5; //玩家数(单人时为1)
     optional bool auto_fill = 6; //是否自动填充玩家
     optional int32 bot = 7; //是否机器人
     optional string name = 8; //角色名