diff --git a/apis.md.go b/apis.md.go
index dd976d3..43b8d3d 100644
--- a/apis.md.go
+++ b/apis.md.go
@@ -310,6 +310,20 @@ func (c *WorkwxApp) execTransferGroupChatExternalContact(req reqTransferGroupCha
 	return resp, nil
 }
 
+// execExternalContractGroupChatGet 获取客户群详情
+func (c *WorkwxApp) execExternalContractGroupChatGet(req reqGroupChatExternalContact) (respGetExternalContractGroupChatResult, error) {
+	var resp respGetExternalContractGroupChatResult
+	err := c.executeQyapiJSONPost("/cgi-bin/externalcontact/groupchat/get", req, &resp, true)
+	if err != nil {
+		return respGetExternalContractGroupChatResult{}, err
+	}
+	if bizErr := resp.TryIntoErr(); bizErr != nil {
+		return respGetExternalContractGroupChatResult{}, bizErr
+	}
+
+	return resp, nil
+}
+
 // execAppchatCreate 创建群聊会话
 func (c *WorkwxApp) execAppchatCreate(req reqAppchatCreate) (respAppchatCreate, error) {
 	var resp respAppchatCreate
diff --git a/docs/apis.md b/docs/apis.md
index b2cc794..bb7de6c 100644
--- a/docs/apis.md
+++ b/docs/apis.md
@@ -100,6 +100,7 @@ Name|Request Type|Response Type|Access Token|URL|Doc
 `execTransferExternalContact`|`reqTransferExternalContact`|`respTransferExternalContact`|+|`POST /cgi-bin/externalcontact/transfer`|[分配成员的客户](https://work.weixin.qq.com/api/doc/90000/90135/92125)
 `execGetTransferExternalContactResult`|`reqGetTransferExternalContactResult`|`respGetTransferExternalContactResult`|+|`POST /cgi-bin/externalcontact/get_transfer_result`|[查询客户接替结果](https://work.weixin.qq.com/api/doc/90000/90135/92973)
 `execTransferGroupChatExternalContact`|`reqTransferGroupChatExternalContact`|`respTransferGroupChatExternalContact`|+|`POST /cgi-bin/externalcontact/groupchat/transfer`|[离职成员的群再分配](https://work.weixin.qq.com/api/doc/90000/90135/92127)
+`execExternalContractGroupChatGet`|`reqGroupChatExternalContact`|`respGetExternalContractGroupChatResult`|+|`POST /cgi-bin/externalcontact/groupchat/get`|[获取客户群详情](https://work.weixin.qq.com/api/doc/90000/90135/92122)
 
 # 应用管理
 
diff --git a/docs/external_contact.md b/docs/external_contact.md
index 59d1a1e..078e8d5 100644
--- a/docs/external_contact.md
+++ b/docs/external_contact.md
@@ -229,3 +229,32 @@ Name|JSON|Type|Doc
 `ChatID`|`chat_id`|`string`| 没能成功继承的群ID
 `ErrCode`|`errcode`|`int`| 没能成功继承的群，错误码
 `ErrMsg`|`errmsg`|`string`| 没能成功继承的群，错误描述
+
+### `ExternalContractGroupMemberList` 群成员列表
+
+Name|JSON|Type|Doc
+:---|:---|:---|:--
+`Userid`|`userid`|`string`|
+`Type`|`type`|`int`| 成员类型。1 - 企业成员 2 - 外部联系人
+`JoinTime`|`join_time`|`int`|
+`JoinScene`|`join_scene`|`int`| 入群方式。1 - 由群成员邀请入群（直接邀请入群）2 - 由群成员邀请入群（通过邀请链接入群）3 - 通过扫描群二维码入群
+`GroupNickname`|`group_nickname`|`string`| 在群里的昵称
+`Name`|`name`|`string`| 名字。仅当 need_name = 1 时返回
+
+### `ExternalContractGroupAdminList` 群管理员列表
+
+Name|JSON|Type|Doc
+:---|:---|:---|:--
+`Userid`|`userid`|`string`| 群管理员userid
+
+### `ExternalContractGroupChat` 客户群详情
+
+Name|JSON|Type|Doc
+:---|:---|:---|:--
+`ChatID`|`chat_id`|`string`| 客户群ID
+`Name`|`name`|`string`| 群名
+`Owner`|`owner`|`string`| 群主ID
+`CreateTime`|`create_time`|`int`| 群的创建时间
+`Notice`|`notice`|`string`| 群公告
+`MemberList`|`member_list`|`[]ExternalContractGroupMemberList`| 群成员列表
+`AdminList`|`admin_list`|`[]ExternalContractGroupAdminList`| 群管理员列表
diff --git a/external_contact.go b/external_contact.go
index 37252b7..e9fe37d 100644
--- a/external_contact.go
+++ b/external_contact.go
@@ -167,3 +167,15 @@ func (c *WorkwxApp) TransferGroupChatExternalContact(chatIDList []string, newOwn
 	}
 	return resp.FailedChatList, nil
 }
+
+// GetGroupChatExternalContact 获取客户群详情
+func (c *WorkwxApp) GetGroupChatExternalContact(chatID string, needName int) (*ExternalContractGroupChat, error) {
+	resp, err := c.execExternalContractGroupChatGet(reqGroupChatExternalContact{
+		ChatID:   chatID,
+		NeedName: needName,
+	})
+	if err != nil {
+		return nil, err
+	}
+	return &resp.ExternalContractGroupChat, nil
+}
diff --git a/external_contact.md.go b/external_contact.md.go
index 6480fd5..9cf3c97 100644
--- a/external_contact.md.go
+++ b/external_contact.md.go
@@ -271,3 +271,41 @@ type ExternalContactGroupChatTransferFailed struct {
 	// ErrMsg 没能成功继承的群，错误描述
 	ErrMsg string `json:"errmsg"`
 }
+
+// ExternalContractGroupMemberList 群成员列表
+type ExternalContractGroupMemberList struct {
+	Userid string `json:"userid"`
+	// Type 成员类型。1 - 企业成员 2 - 外部联系人
+	Type     int `json:"type"`
+	JoinTime int `json:"join_time"`
+	// JoinScene 入群方式。1 - 由群成员邀请入群（直接邀请入群）2 - 由群成员邀请入群（通过邀请链接入群）3 - 通过扫描群二维码入群
+	JoinScene int `json:"join_scene"`
+	// GroupNickname 在群里的昵称
+	GroupNickname string `json:"group_nickname"`
+	// Name 名字。仅当 need_name = 1 时返回
+	Name string `json:"name"`
+}
+
+// ExternalContractGroupAdminList 群管理员列表
+type ExternalContractGroupAdminList struct {
+	// Userid 群管理员userid
+	Userid string `json:"userid"`
+}
+
+// ExternalContractGroupChat 客户群详情
+type ExternalContractGroupChat struct {
+	// ChatID 客户群ID
+	ChatID string `json:"chat_id"`
+	// Name 群名
+	Name string `json:"name"`
+	// Owner 群主ID
+	Owner string `json:"owner"`
+	// CreateTime 群的创建时间
+	CreateTime int `json:"create_time"`
+	// Notice 群公告
+	Notice string `json:"notice"`
+	// MemberList 群成员列表
+	MemberList []ExternalContractGroupMemberList `json:"member_list"`
+	// AdminList 群管理员列表
+	AdminList []ExternalContractGroupAdminList `json:"admin_list"`
+}
diff --git a/models.go b/models.go
index 2340d96..298102f 100644
--- a/models.go
+++ b/models.go
@@ -740,8 +740,8 @@ func (x reqMsgAuditGetGroupChat) intoBody() ([]byte, error) {
 type respMsgAuditGetGroupChat struct {
 	respCommon
 	Members []struct {
-		MemberID int `json:"memberid"`
-		JoinTime int `json:"jointime"`
+		MemberID string `json:"memberid"`
+		JoinTime int    `json:"jointime"`
 	} `json:"members"`
 	RoomName       string `json:"roomname"`
 	Creator        string `json:"creator"`
@@ -891,6 +891,29 @@ type respTransferGroupChatExternalContact struct {
 	FailedChatList []ExternalContactGroupChatTransferFailed `json:"failed_chat_list"`
 }
 
+type reqGroupChatExternalContact struct {
+	//客户群ID
+	ChatID string `json:"chat_id"`
+	//是否需要返回群成员的名字group_chat.member_list.name。0-不返回；1-返回。默认不返回
+	NeedName int `json:"need_name"`
+}
+
+var _ bodyer = reqGroupChatExternalContact{}
+
+func (x reqGroupChatExternalContact) intoBody() ([]byte, error) {
+	result, err := json.Marshal(x)
+	if err != nil {
+		return nil, err
+	}
+
+	return result, nil
+}
+
+type respGetExternalContractGroupChatResult struct {
+	respCommon
+	ExternalContractGroupChat `json:"group_chat"`
+}
+
 type reqOAGetTemplateDetail struct {
 	TemplateID string `json:"template_id"`
 }
diff --git a/msg_audit.go b/msg_audit.go
index b2006c1..5980cf5 100644
--- a/msg_audit.go
+++ b/msg_audit.go
@@ -91,7 +91,7 @@ func (c *WorkwxApp) ListMsgAuditPermitUser(msgAuditEdition MsgAuditEdition) ([]s
 // MsgAuditGroupChatMember 获取会话内容存档内部群成员
 type MsgAuditGroupChatMember struct {
 	// MemberID roomid群成员的id，userid
-	MemberID int
+	MemberID string
 	// JoinTime roomid群成员的入群时间
 	JoinTime time.Time
 }