diff --git a/dbproxy/svc/l_lotterycode.go b/dbproxy/svc/l_lotterycode.go
index c542a21..502f9ae 100644
--- a/dbproxy/svc/l_lotterycode.go
+++ b/dbproxy/svc/l_lotterycode.go
@@ -83,7 +83,8 @@ func (svc *LotteryCodeSvc) GetJoinNum(req *model.GetLotteryCodeReq, resp *int) (
 	tc := new(m)
 	err = c.Pipe([]bson.M{
 		{"$match": bson.M{"snid": bson.M{"$gt": 0}, "cid": req.CId, "startts": req.StartTs}},
-		{"$group": bson.M{"_id": bson.M{"snid": "$snid"}, "count": bson.M{"$sum": "$count"}}},
+		{"$group": bson.M{"_id": bson.M{"snid": "$snid"}}},
+		{"$count": "count"},
 	}).AllowDiskUse().One(tc)
 	if err != nil && !errors.Is(err, mgo.ErrNotFound) {
 		logger.Logger.Warn("GetJoinNum error:", err)