diff --git a/backend/go-service/app/meeting/controller/meeting_controller.go b/backend/go-service/app/meeting/controller/meeting_controller.go
index f83120b..c0eed45 100644
--- a/backend/go-service/app/meeting/controller/meeting_controller.go
+++ b/backend/go-service/app/meeting/controller/meeting_controller.go
@@ -41,6 +41,14 @@ type cloudLawCreateMeetingRequest struct {
 	CallType     string `json:"callType"`
 }
 
+type cloudLawJoinMeetingRequest struct {
+	ReceiverID    int64  `json:"receiverId"`
+	ReceiverType  string `json:"receiverType"`
+	ReceiverPhone string `json:"receiverPhone"`
+	ReceiverName  string `json:"receiverName"`
+	CallID        string `json:"callId"`
+}
+
 func (ctl *MeetingController) requireCloudLawInternalToken(c *gin.Context) bool {
 	expected := ""
 	if ctl.meetingConfig != nil {
@@ -270,6 +278,48 @@ func (ctl *MeetingController) CloudLawGetMeeting(c *gin.Context) {
 	utils.ResponseOK(c, cloudLawMeetingPayload(room, onlineCount))
 }
 
+func (ctl *MeetingController) CloudLawJoinMeeting(c *gin.Context) {
+	if !ctl.requireCloudLawInternalToken(c) {
+		return
+	}
+	code := c.Param("code")
+	if code == "" {
+		utils.ResponseBadRequest(c, "会议号不能为空")
+		return
+	}
+	var req cloudLawJoinMeetingRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		utils.ResponseBadRequest(c, "参数校验失败: "+err.Error())
+		return
+	}
+	req.ReceiverPhone = strings.TrimSpace(req.ReceiverPhone)
+	req.ReceiverName = strings.TrimSpace(req.ReceiverName)
+	if req.ReceiverPhone == "" {
+		utils.ResponseBadRequest(c, "receiverPhone不能为空")
+		return
+	}
+	user, created, err := ctl.meetingService.EnsureCloudLawUserByPhone(c.Request.Context(), req.ReceiverPhone, req.ReceiverName)
+	if err != nil {
+		ctl.handleError(c, err, "创建云律会议接单人失败")
+		return
+	}
+	room, participant, _, err := ctl.meetingService.JoinRoomForInternal(c.Request.Context(), user.ID, code)
+	if err != nil {
+		ctl.handleError(c, err, "云律接单人加入会议失败")
+		return
+	}
+	payload := cloudLawMeetingPayload(room, 0)
+	payload["callId"] = req.CallID
+	payload["receiverId"] = req.ReceiverID
+	payload["receiverType"] = req.ReceiverType
+	payload["echoChatParticipantUserId"] = strconv.FormatInt(user.ID, 10)
+	payload["echoChatParticipantUserCreated"] = created
+	if participant != nil {
+		payload["participantId"] = strconv.FormatInt(participant.ID, 10)
+	}
+	utils.ResponseOK(c, payload)
+}
+
 func (ctl *MeetingController) CloudLawEndMeeting(c *gin.Context) {
 	if !ctl.requireCloudLawInternalToken(c) {
 		return
diff --git a/backend/go-service/app/meeting/router.go b/backend/go-service/app/meeting/router.go
index 56c955f..e4676bd 100644
--- a/backend/go-service/app/meeting/router.go
+++ b/backend/go-service/app/meeting/router.go
@@ -50,6 +50,7 @@ func RegisterRoutes(
 	registerCloudLawRoutes := func(group *gin.RouterGroup) {
 		group.POST("/meetings", ctrl.CloudLawCreateMeeting)
 		group.GET("/meetings/:code", ctrl.CloudLawGetMeeting)
+		group.POST("/meetings/:code/join", ctrl.CloudLawJoinMeeting)
 		group.POST("/meetings/:code/end", ctrl.CloudLawEndMeeting)
 	}
 	registerCloudLawRoutes(r.Group("/api/v1/cloud-law"))
diff --git a/backend/go-service/app/meeting/service/meeting_service.go b/backend/go-service/app/meeting/service/meeting_service.go
index fb769b8..e6b8f9a 100644
--- a/backend/go-service/app/meeting/service/meeting_service.go
+++ b/backend/go-service/app/meeting/service/meeting_service.go
@@ -355,7 +355,62 @@ func (s *MeetingService) CreateRoom(ctx context.Context, hostID int64, req *dto.
 }
 
 func (s *MeetingService) CreateRoomForInternal(ctx context.Context, hostID int64, req *dto.CreateMeetingRoomRequest) (*model.MeetingRoom, *model.MeetingParticipant, string, error) {
-	return s.createRoom(ctx, hostID, req, false, false, "service.meeting_service.CreateRoomForInternal")
+	return s.createRoom(ctx, hostID, req, false, true, "service.meeting_service.CreateRoomForInternal")
+}
+
+func (s *MeetingService) JoinRoomForInternal(ctx context.Context, userID int64, code string) (*model.MeetingRoom, *model.MeetingParticipant, string, error) {
+	funcName := "service.meeting_service.JoinRoomForInternal"
+	room, err := s.roomDAO.GetByCode(ctx, code)
+	if err != nil {
+		return nil, nil, "", err
+	}
+	if room == nil {
+		return nil, nil, "", ErrMeetingNotFound
+	}
+	if room.Status == constants.MeetingStatusEnded {
+		return nil, nil, "", ErrMeetingEnded
+	}
+	if existing, pErr := s.participantDAO.GetByRoomAndUser(ctx, room.ID, userID); pErr != nil {
+		return nil, nil, "", pErr
+	} else if existing != nil && existing.IsActive() {
+		routerID, _ := s.mediaOrchestrator.ResolveRouterID(code)
+		return room, existing, routerID, nil
+	}
+	activeCount, err := s.participantDAO.CountActiveByRoom(ctx, room.ID)
+	if err != nil {
+		return nil, nil, "", err
+	}
+	if int(activeCount) >= room.MaxMembers {
+		return nil, nil, "", ErrMeetingFull
+	}
+	participant, err := s.participantDAO.JoinRoom(ctx, room.ID, userID, constants.MeetingRoleParticipant)
+	if err != nil {
+		if errors.Is(err, dao.ErrAlreadyInMeeting) {
+			existing, getErr := s.participantDAO.GetByRoomAndUser(ctx, room.ID, userID)
+			if getErr != nil {
+				return nil, nil, "", getErr
+			}
+			routerID, _ := s.mediaOrchestrator.ResolveRouterID(code)
+			return room, existing, routerID, nil
+		}
+		return nil, nil, "", err
+	}
+	if s.lifecycleSvc != nil {
+		s.lifecycleSvc.CancelEmptyTTL(ctx, code)
+	}
+	routerID, _ := s.mediaOrchestrator.ResolveRouterID(code)
+	if routerID == "" {
+		newID, mediaErr := s.mediaOrchestrator.CreateRouter(ctx, code)
+		if mediaErr != nil {
+			if _, leaveErr := s.participantDAO.LeaveRoom(ctx, room.ID, userID, constants.MeetingLeftReasonSelf); leaveErr != nil {
+				logs.Warn(ctx, funcName, "内部入会补偿 LeaveRoom 失败", zap.Int64("room_id", room.ID), zap.Int64("user_id", userID), zap.Error(leaveErr))
+			}
+			return nil, nil, "", ErrMediaServiceUnavailable
+		}
+		routerID = newID
+	}
+	logs.Info(ctx, funcName, "云律接单人加入会议成功", zap.String("room_code", code), zap.Int64("user_id", userID))
+	return room, participant, routerID, nil
 }
 
 func (s *MeetingService) createRoom(ctx context.Context, hostID int64, req *dto.CreateMeetingRoomRequest, enforceSingleActive bool, addHostParticipant bool, funcName string) (*model.MeetingRoom, *model.MeetingParticipant, string, error) {