diff --git a/internal/api/admin/welfare_activities_admin.go b/internal/api/admin/welfare_activities_admin.go
index 028b893..b6b3cc2 100644
--- a/internal/api/admin/welfare_activities_admin.go
+++ b/internal/api/admin/welfare_activities_admin.go
@@ -111,7 +111,7 @@ func (h *handler) GetWelfareActivity() core.HandlerFunc {
 			ctx.AbortWithError(core.Error(http.StatusBadRequest, code.ParamBindError, "活动ID无效"))
 			return
 		}
-		res, err := h.welfare.GetActivity(ctx.RequestContext(), id, 0)
+		res, err := h.welfare.GetActivityAdmin(ctx.RequestContext(), id)
 		if err != nil {
 			ctx.AbortWithError(core.Error(http.StatusBadRequest, code.GetActivityError, err.Error()))
 			return
diff --git a/internal/service/welfare_activity/activity.go b/internal/service/welfare_activity/activity.go
index b99449d..2a85bcf 100644
--- a/internal/service/welfare_activity/activity.go
+++ b/internal/service/welfare_activity/activity.go
@@ -164,15 +164,27 @@ func (s *service) GetActivity(ctx context.Context, id int64, userID int64) (*Act
 	if userID <= 0 && item.Status == StatusActive && time.Now().Before(item.StartTime) {
 		return nil, errors.New("活动未开始")
 	}
+	return s.buildActivityDetail(ctx, item, userID)
+}
+
+func (s *service) GetActivityAdmin(ctx context.Context, id int64) (*ActivityDetail, error) {
+	var item Activity
+	if err := s.repo.GetDbR().WithContext(ctx).Where("id = ? AND deleted_at IS NULL", id).First(&item).Error; err != nil {
+		return nil, err
+	}
+	return s.buildActivityDetail(ctx, item, 0)
+}
+
+func (s *service) buildActivityDetail(ctx context.Context, item Activity, userID int64) (*ActivityDetail, error) {
 	detail := &ActivityDetail{Activity: item}
-	s.repo.GetDbR().WithContext(ctx).Where("activity_id = ?", id).Order("sort ASC, id ASC").Find(&detail.Prizes)
+	s.repo.GetDbR().WithContext(ctx).Where("activity_id = ?", item.ID).Order("sort ASC, id ASC").Find(&detail.Prizes)
 	s.fillPrizeMeta(ctx, detail.Prizes)
-	participants, _ := s.ListParticipants(ctx, id, 1, 20)
+	participants, _ := s.ListParticipants(ctx, item.ID, 1, 20)
 	if participants != nil {
 		detail.ParticipantCount = participants.Total
 		detail.Participants = participants.List
 	}
-	winners, _ := s.ListWinners(ctx, id, 1, 20)
+	winners, _ := s.ListWinners(ctx, item.ID, 1, 20)
 	if winners != nil {
 		detail.Winners = winners.List
 	}
@@ -181,7 +193,7 @@ func (s *service) GetActivity(ctx context.Context, id int64, userID int64) (*Act
 		detail.CurrentPaid, _ = s.sumPaidAmount(ctx, userID, start, end)
 		detail.CanJoin = isJoinWindowOpen(item, time.Now()) && detail.CurrentPaid >= item.ThresholdAmount
 		var count int64
-		s.repo.GetDbR().WithContext(ctx).Model(&Participant{}).Where("activity_id = ? AND user_id = ? AND period_key = ?", id, userID, period).Count(&count)
+		s.repo.GetDbR().WithContext(ctx).Model(&Participant{}).Where("activity_id = ? AND user_id = ? AND period_key = ?", item.ID, userID, period).Count(&count)
 		detail.Joined = count > 0
 	}
 	return detail, nil
diff --git a/internal/service/welfare_activity/welfare_activity.go b/internal/service/welfare_activity/welfare_activity.go
index 30863fc..97070ec 100644
--- a/internal/service/welfare_activity/welfare_activity.go
+++ b/internal/service/welfare_activity/welfare_activity.go
@@ -24,6 +24,7 @@ type Service interface {
 	CopyActivity(ctx context.Context, id int64, req SaveActivityRequest) (int64, error)
 	ListActivities(ctx context.Context, req ListActivitiesRequest) (*ListActivitiesResponse, error)
 	GetActivity(ctx context.Context, id int64, userID int64) (*ActivityDetail, error)
+	GetActivityAdmin(ctx context.Context, id int64) (*ActivityDetail, error)
 	DeleteActivity(ctx context.Context, id int64) error
 	SavePrizes(ctx context.Context, activityID int64, prizes []PrizeInput) error
 	ListParticipants(ctx context.Context, activityID int64, page int, pageSize int) (*ParticipantResponse, error)