diff --git a/server/imserver/constant.go b/server/imserver/constant.go
index 069711da..718bb6b2 100644
--- a/server/imserver/constant.go
+++ b/server/imserver/constant.go
@@ -16,6 +16,18 @@ const (
 	GAME_ID   = 206
 )
 
+// im server chat
+const (
+	kCCBegin   = iota
+	kCCWorld   = 1
+	kCCPrivate = 2
+	kCCGuild   = 3
+	kCCTeam    = 4
+	kCCBigHorn = 5
+	kCCLoopMsg = 6
+	kCCEnd
+)
+
 // im server friend
 const (
 	MaxFriendMembers     = 200
@@ -36,21 +48,11 @@ const (
 	OnlineStatus    = 1 // 在线状态 在线
 )
 
-const (
-	kCCBegin   = iota
-	kCCWorld   = 1
-	kCCPrivate = 2
-	kCCGuild   = 3
-	kCCTeam    = 4
-	kCCBigHorn = 5
-	kCCLoopMsg = 6
-	kCCEnd
-)
-
 // im server guild
 const (
 	RandomGuildCount           = 10
 	MaxMembers                 = 30
+	MaxMembersViceLeader       = 2
 	MaxPendingReqs             = 10
 	DefaultLogs                = 20
 	LogTypeApprove             = 1 // 公会日志类型， 批准加入
@@ -105,21 +107,22 @@ const (
 	ERR_CODE_SEARCH_NO_RESULT               = 11016
 
 	// Guild
-	ERR_CODE_GUILD_NO_EXISTS                      = 12001
-	ERR_CODE_JOINED_GUILD                         = 12002
-	ERR_CODE_CREATE_GUILD_FAIL                    = 12003
-	ERR_CODE_APPLY_GUILD_FAIL                     = 12004
-	ERR_CODE_GUILD_MEMBER_NO_EXISTS               = 12005
-	ERR_CODE_GUILD_MEMBER_FULL                    = 12006
-	ERR_CODE_GUILD_PENDING_REQUEST_NO_EXISTS      = 12007
-	ERR_CODE_GUILD_NO_LEADER_PERM                 = 12008
-	ERR_CODE_GUILD_BLOCKED_LEADER                 = 12009
-	ERR_CODE_GUILD_OPERATOR_MEMBER_NO_PERM        = 12010
-	ERR_CODE_GUILD_DISMISS_MEMBER_NO_PERM         = 12011
-	ERR_CODE_CREATE_GUILD_DB_FAIL                 = 12013
-	ERR_CODE_CREATE_GUILD_MEMBER_DB_FAIL          = 12014
-	ERR_CODE_UPDATE_GUILD_DB_FAIL                 = 12015
-	ERR_CODE_UPDATE_GUILD_MEMBER_DB_FAIL          = 12016
-	ERR_CODE_UPDATE_GUILD_PENDING_REQUEST_DB_FAIL = 12017
-	ERR_CODE_REQUEST_PARAMS_ERROR                 = 12018
+	ERR_CODE_GUILD_NO_EXISTS                            = 12001
+	ERR_CODE_JOINED_GUILD                               = 12002
+	ERR_CODE_CREATE_GUILD_FAIL                          = 12003
+	ERR_CODE_APPLY_GUILD_FAIL                           = 12004
+	ERR_CODE_GUILD_MEMBER_NO_EXISTS                     = 12005
+	ERR_CODE_GUILD_MEMBER_FULL                          = 12006
+	ERR_CODE_GUILD_PENDING_REQUEST_NO_EXISTS            = 12007
+	ERR_CODE_GUILD_NO_LEADER_PERM                       = 12008
+	ERR_CODE_GUILD_BLOCKED_LEADER                       = 12009
+	ERR_CODE_GUILD_OPERATOR_MEMBER_NO_PERM              = 12010
+	ERR_CODE_GUILD_DISMISS_MEMBER_NO_PERM               = 12011
+	ERR_CODE_CREATE_GUILD_DB_FAIL                       = 12013
+	ERR_CODE_CREATE_GUILD_MEMBER_DB_FAIL                = 12014
+	ERR_CODE_UPDATE_GUILD_DB_FAIL                       = 12015
+	ERR_CODE_UPDATE_GUILD_MEMBER_DB_FAIL                = 12016
+	ERR_CODE_UPDATE_GUILD_PENDING_REQUEST_DB_FAIL       = 12017
+	ERR_CODE_REQUEST_PARAMS_ERROR                       = 12018
+	ERR_CODE_GUILD_SETMEMBERLEVEL_VICE_LEADER_MAX_LIMIT = 12019
 )
diff --git a/server/imserver/guild.go b/server/imserver/guild.go
index de453473..bdaa9f69 100644
--- a/server/imserver/guild.go
+++ b/server/imserver/guild.go
@@ -46,6 +46,16 @@ func (g *Guild) GetMembersCount() int {
 	return len(g.Members)
 }
 
+func (g *Guild) GetMembersViceLeaderCount() int {
+	count := 0
+	for _, member := range g.Members {
+		if member.Level == GuildMemberLevelViceLeader {
+			count++
+		}
+	}
+	return count
+}
+
 // GetMember 根据 AccountId 获取成员信息
 func (g *Guild) GetMember(accountId string) *GuildMember {
 	if member, exists := g.Members[accountId]; exists {
diff --git a/server/imserver/guildmgr.go b/server/imserver/guildmgr.go
index cf885495..fe75445b 100644
--- a/server/imserver/guildmgr.go
+++ b/server/imserver/guildmgr.go
@@ -524,7 +524,7 @@ func (gm *GuildMgr) DismissMember(operatorAccountId, accountId string, cb func(e
 }
 
 // SetMemberLevel 设置公会成员等级
-func (gm *GuildMgr) SetMemberLevel(operatorAccountId, accountId string, level int32, cb func(errCode int32, errMsg string)) {
+func (gm *GuildMgr) SetMemberLevel(operatorAccountId, accountId string, newLevel int32, cb func(errCode int32, errMsg string)) {
 	// 干部, 精英, 副会长
 	guild := gm.GetGuildByAccountId(operatorAccountId)
 	if guild == nil {
@@ -544,24 +544,26 @@ func (gm *GuildMgr) SetMemberLevel(operatorAccountId, accountId string, level in
 	}
 
 	beforeLevel := member.Level
-	if member.Level == level {
+	if member.Level == newLevel {
 		cb(ERR_CODE_GUILD_OPERATOR_MEMBER_NO_PERM, "SetMemberLevel error")
 		return
 	}
 
-	fields := [][]string{{"level", q5.ToString(level)}}
+	// 副会长上限2个
+	if newLevel == GuildMemberLevelViceLeader && guild.GetMembersViceLeaderCount() >= MaxMembersViceLeader {
+		cb(ERR_CODE_GUILD_SETMEMBERLEVEL_VICE_LEADER_MAX_LIMIT, "SetMemberLevel Vice leader max limit")
+		return
+	}
+
+	fields := [][]string{{"level", q5.ToString(newLevel)}}
 	gm.updateGuildMember(guild, member.AccountId, fields, func(err error) {
 		if err != nil {
 			cb(ERR_CODE_UPDATE_GUILD_MEMBER_DB_FAIL, err.Error())
 			return
 		}
 
-		member.Level = level
 		// 转让会长的操作
-		if level == GuildMemberLevelLeader {
-			operatorMember := guild.GetMember(operatorAccountId)
-			operatorMember.Level = GuildMemberLevelDefault
-
+		if newLevel == GuildMemberLevelLeader {
 			guild.LeaderId = member.AccountId
 			updateFields := [][]string{
 				{"leader_account_id", q5.ToString(guild.LeaderId)},
@@ -571,19 +573,32 @@ func (gm *GuildMgr) SetMemberLevel(operatorAccountId, accountId string, level in
 					cb(ERR_CODE_UPDATE_GUILD_DB_FAIL, err.Error())
 					return
 				}
-				// 新会长
-				newMemberFields := [][]string{{"level", q5.ToString(member.Level)}}
-				gm.updateGuildMember(guild, member.AccountId, newMemberFields,
+
+				// 旧会长 -> 普通成员
+				oldMember := guild.GetMember(operatorAccountId)
+				oldMemberFields := [][]string{{"level", q5.ToString(GuildMemberLevelDefault)}}
+				gm.updateGuildMember(guild, oldMember.AccountId, oldMemberFields,
 					func(err error) {
 						if err != nil {
 							cb(ERR_CODE_UPDATE_GUILD_MEMBER_DB_FAIL, err.Error())
 							return
 						}
+						oldMember.Level = GuildMemberLevelDefault
 					})
 			})
 		}
 
-		logContent := fmt.Sprintf("SetMemberLevel[%d-%s-%s-%d-%d]", guild.GuildId, operatorAccountId, accountId, beforeLevel, level)
+		newMemberFields := [][]string{{"level", q5.ToString(newLevel)}}
+		gm.updateGuildMember(guild, member.AccountId, newMemberFields,
+			func(err error) {
+				if err != nil {
+					cb(ERR_CODE_UPDATE_GUILD_MEMBER_DB_FAIL, err.Error())
+					return
+				}
+				member.Level = newLevel
+			})
+
+		logContent := fmt.Sprintf("SetMemberLevel[%d-%s-%s-%d-%d]", guild.GuildId, operatorAccountId, accountId, beforeLevel, newLevel)
 		gm.WriteLog(guild.GuildId, accountId, LogTypeChangeLevel, logContent)
 
 		// Add event
@@ -591,7 +606,7 @@ func (gm *GuildMgr) SetMemberLevel(operatorAccountId, accountId string, level in
 		prop["guild_id"] = q5.ToString(guild.GuildId)
 		prop["accountId"] = q5.ToString(accountId)
 		prop["beforeMemberLevel"] = q5.ToString(beforeLevel)
-		prop["afterMemberLevel"] = q5.ToString(level)
+		prop["afterMemberLevel"] = q5.ToString(newLevel)
 		prop["members_count"] = q5.ToString(guild.GetMembersCount())
 		f5.GetTgLog().AddTrackLog(
 			GAME_ID,
diff --git a/server/imserver/handlermgr.go b/server/imserver/handlermgr.go
index e44c6586..e401c77b 100644
--- a/server/imserver/handlermgr.go
+++ b/server/imserver/handlermgr.go
@@ -43,6 +43,7 @@ func (this *HandlerMgr) init() {
 	cs.RegHandlerId(int(cs.CMMessageIdE__CMSetName), PLAYER_HANDLER_ID)
 	cs.RegHandlerId(int(cs.CMMessageIdE__CMSetAvatar), PLAYER_HANDLER_ID)
 	cs.RegHandlerId(int(cs.CMMessageIdE__CMSetJoinCond), PLAYER_HANDLER_ID)
+	cs.RegHandlerId(int(cs.CMMessageIdE__CMSetMemberLevel), PLAYER_HANDLER_ID)
 }
 
 func (this *HandlerMgr) unInit() {