diff --git a/internal/api/group/group.go b/internal/api/group/group.go
index 5105a117d..9c7500872 100644
--- a/internal/api/group/group.go
+++ b/internal/api/group/group.go
@@ -3,6 +3,7 @@ package group
 import (
 	api "Open_IM/pkg/base_info"
 	"Open_IM/pkg/common/config"
+	"Open_IM/pkg/common/constant"
 	"Open_IM/pkg/common/log"
 	"Open_IM/pkg/common/token_verify"
 	"Open_IM/pkg/grpc-etcdv3/getcdv3"
@@ -316,7 +317,12 @@ func InviteUserToGroup(c *gin.Context) {
 	}
 	req := &rpc.InviteUserToGroupReq{}
 	utils.CopyStructFields(req, &params)
-
+	if len(req.InvitedUserIDList) > constant.MaxNotificationNum {
+		errMsg := req.OperationID + " too many, Limit: " + utils.IntToString(constant.MaxNotificationNum)
+		log.NewError(req.OperationID, errMsg, len(req.InvitedUserIDList))
+		c.JSON(http.StatusRequestEntityTooLarge, gin.H{"errCode": 400, "errMsg": errMsg})
+		return
+	}
 	var ok bool
 	var errInfo string
 	ok, req.OpUserID, errInfo = token_verify.GetUserIDFromToken(c.Request.Header.Get("token"), req.OperationID)
diff --git a/internal/rpc/msg/group_notification.go b/internal/rpc/msg/group_notification.go
index 8d18657a2..e14bfce8d 100644
--- a/internal/rpc/msg/group_notification.go
+++ b/internal/rpc/msg/group_notification.go
@@ -232,6 +232,9 @@ func GroupCreatedNotification(operationID, opUserID, groupID string, initMemberL
 			continue
 		}
 		GroupCreatedTips.MemberList = append(GroupCreatedTips.MemberList, &groupMemberInfo)
+		if len(GroupCreatedTips.MemberList) == constant.MaxNotificationNum {
+			break
+		}
 	}
 	groupNotification(constant.GroupCreatedNotification, &GroupCreatedTips, opUserID, groupID, "", operationID)
 }
@@ -536,7 +539,6 @@ func MemberInvitedNotification(operationID, groupID, opUserID, reason string, in
 		}
 		MemberInvitedTips.InvitedUserList = append(MemberInvitedTips.InvitedUserList, &groupMemberInfo)
 	}
-
 	groupNotification(constant.MemberInvitedNotification, &MemberInvitedTips, opUserID, groupID, "", operationID)
 }
 
diff --git a/pkg/base_info/public_struct.go b/pkg/base_info/public_struct.go
index 824f58043..e00be850d 100644
--- a/pkg/base_info/public_struct.go
+++ b/pkg/base_info/public_struct.go
@@ -32,7 +32,7 @@ type ApiUserInfo struct {
 
 type GroupAddMemberInfo struct {
 	UserID    string `json:"userID" binding:"required"`
-	RoleLevel int32  `json:"roleLevel" binding:"required"`
+	RoleLevel int32  `json:"roleLevel" binding:"required,oneof= 1 3"`
 }
 
 func SetErrCodeMsg(c *gin.Context, status int) *CommResp {
diff --git a/pkg/common/constant/constant.go b/pkg/common/constant/constant.go
index 7b6c77d12..3deeed5e6 100644
--- a/pkg/common/constant/constant.go
+++ b/pkg/common/constant/constant.go
@@ -303,3 +303,5 @@ const BigVersion = "v2"
 const LogFileName = "OpenIM.log"
 
 const StatisticsTimeInterval = 60
+
+const MaxNotificationNum = 100