diff --git a/bot_test.go b/bot_test.go
index c894b6a..8149a81 100644
--- a/bot_test.go
+++ b/bot_test.go
@@ -1,6 +1,7 @@
 package openwechat
 
 import (
+	"fmt"
 	"testing"
 )
 
@@ -46,6 +47,29 @@ func TestFriend(t *testing.T) {
 	t.Log(friends)
 }
 
+func TestGroup(t *testing.T) {
+	self, err := getSelf()
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	group, err := self.Groups()
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	t.Log(group)
+	g := group.SearchByNickName(1, "GoFrame实战1群")
+	if g.First() != nil {
+		members, err := g.First().Members()
+		if err != nil {
+			t.Error(err)
+			return
+		}
+		fmt.Println(members.Count())
+	}
+}
+
 func TestMps(t *testing.T) {
 	self, err := getSelf()
 	if err != nil {
@@ -77,11 +101,37 @@ func TestAddFriendIntoChatRoom(t *testing.T) {
 		return
 	}
 	searchGroups := groups.SearchByNickName(1, "厉害了")
-	if searchGroups != nil {
-		g := searchGroups.First()
+	if g := searchGroups.First(); g != nil {
 		addFriends := friends.SearchByRemarkName(1, "1")
 		if err := g.AddFriendsIn(addFriends...); err != nil {
 			t.Error(err)
 		}
 	}
 }
+
+func TestRemoveFriendIntoChatRoom(t *testing.T) {
+	self, err := getSelf()
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	groups, err := self.Groups()
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	friends, err := self.Friends()
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	searchGroups := groups.SearchByNickName(1, "厉害了")
+	if g := searchGroups.First(); g != nil {
+		addFriends := friends.SearchByRemarkName(1, "大爷")
+		if f := addFriends.First(); f != nil {
+			if err := g.RemoveMembers(Members{f.User}); err != nil {
+				t.Error(err)
+			}
+		}
+	}
+}
diff --git a/caller.go b/caller.go
index a696df8..ae2d6a1 100644
--- a/caller.go
+++ b/caller.go
@@ -228,11 +228,20 @@ func (c *Caller) Logout(info *LoginInfo) error {
 }
 
 // 拉好友入群
-func (c *Caller) AddFriendIntoChatRoom(req *BaseRequest, group *Group, friends ...*Friend) error {
+func (c *Caller) AddFriendIntoChatRoom(req *BaseRequest, info *LoginInfo, group *Group, friends ...*Friend) error {
 	if len(friends) == 0 {
 		return errors.New("no friends found")
 	}
-	resp := NewReturnResponse(c.Client.AddMemberIntoChatRoom(req, group, friends...))
+	resp := NewReturnResponse(c.Client.AddMemberIntoChatRoom(req, info, group, friends...))
+	return parseBaseResponseError(resp)
+}
+
+// 从群聊中移除用户
+func (c *Caller) RemoveFriendFromChatRoom(req *BaseRequest, info *LoginInfo, group *Group, users ...*User) error {
+	if len(users) == 0 {
+		return errors.New("no users found")
+	}
+	resp := NewReturnResponse(c.Client.RemoveMemberFromChatRoom(req, info, group, users...))
 	return parseBaseResponseError(resp)
 }
 
diff --git a/client.go b/client.go
index 0f8b6b6..25a55cf 100644
--- a/client.go
+++ b/client.go
@@ -413,10 +413,12 @@ func (c *Client) Logout(info *LoginInfo) (*http.Response, error) {
 }
 
 // 添加用户进群聊
-func (c *Client) AddMemberIntoChatRoom(req *BaseRequest, group *Group, friends ...*Friend) (*http.Response, error) {
+func (c *Client) AddMemberIntoChatRoom(req *BaseRequest, info *LoginInfo, group *Group, friends ...*Friend) (*http.Response, error) {
 	path, _ := url.Parse(c.webWxUpdateChatRoomUrl)
 	params := url.Values{}
 	params.Add("fun", "addmember")
+	params.Add("pass_ticket", info.PassTicket)
+	params.Add("lang", "zh_CN")
 	path.RawQuery = params.Encode()
 	addMemberList := make([]string, 0)
 	for _, friend := range friends {
@@ -430,3 +432,23 @@ func (c *Client) AddMemberIntoChatRoom(req *BaseRequest, group *Group, friends .
 	buffer, _ := ToBuffer(content)
 	return c.Post(path.String(), jsonContentType, buffer)
 }
+
+// 从群聊中移除用户
+func (c *Client) RemoveMemberFromChatRoom(req *BaseRequest, info *LoginInfo, group *Group, friends ...*User) (*http.Response, error) {
+	path, _ := url.Parse(c.webWxUpdateChatRoomUrl)
+	params := url.Values{}
+	params.Add("fun", "delmember")
+	params.Add("lang", "zh_CN")
+	params.Add("pass_ticket", info.PassTicket)
+	delMemberList := make([]string, 0)
+	for _, friend := range friends {
+		delMemberList = append(delMemberList, friend.UserName)
+	}
+	content := map[string]interface{}{
+		"ChatRoomName":  group.UserName,
+		"BaseRequest":   req,
+		"DelMemberList": strings.Join(delMemberList, ","),
+	}
+	buffer, _ := ToBuffer(content)
+	return c.Post(path.String(), jsonContentType, buffer)
+}
diff --git a/relations.go b/relations.go
index f528a14..d9194a3 100644
--- a/relations.go
+++ b/relations.go
@@ -1,6 +1,7 @@
 package openwechat
 
 import (
+	"errors"
 	"fmt"
 	"os"
 	"strings"
@@ -146,7 +147,54 @@ func (g *Group) Members() (Members, error) {
 
 // 拉好友入群
 func (g *Group) AddFriendsIn(friends ...*Friend) error {
-	return g.Self.Bot.Caller.AddFriendIntoChatRoom(g.Self.Bot.storage.Request, g, friends...)
+	if len(friends) == 0 {
+		return nil
+	}
+	groupMembers, err := g.Members()
+	if err != nil {
+		return err
+	}
+	for _, friend := range friends {
+		for _, member := range groupMembers {
+			if member.UserName == friend.UserName {
+				return fmt.Errorf("user %s has alreay in this group", friend.String())
+			}
+		}
+	}
+	req := g.Self.Bot.storage.Request
+	info := g.Self.Bot.storage.LoginInfo
+	return g.Self.Bot.Caller.AddFriendIntoChatRoom(req, info, g, friends...)
+}
+
+// 从群聊中移除用户
+// Deprecated
+// 无论是网页版，还是程序上都不起作用
+func (g *Group) RemoveMembers(members Members) error {
+	if len(members) == 0 {
+		return nil
+	}
+	if g.IsOwner == 0 {
+		return errors.New("group owner required")
+	}
+	groupMembers, err := g.Members()
+	if err != nil {
+		return err
+	}
+	// 判断用户是否在群聊中
+	var count int
+	for _, member := range members {
+		for _, gm := range groupMembers {
+			if gm.UserName == member.UserName {
+				count++
+			}
+		}
+	}
+	if count != len(members) {
+		return errors.New("invalid members")
+	}
+	req := g.Self.Bot.storage.Request
+	info := g.Self.Bot.storage.LoginInfo
+	return g.Self.Bot.Caller.RemoveFriendFromChatRoom(req, info, g, members...)
 }
 
 type Groups []*Group