diff --git a/internal/rpc/msg/rpcChat.go b/internal/rpc/msg/rpcChat.go
index 1dee643c7..59b36f65d 100644
--- a/internal/rpc/msg/rpcChat.go
+++ b/internal/rpc/msg/rpcChat.go
@@ -91,10 +91,11 @@ func (rpc *rpcChat) runCh() {
 	for {
 		select {
 		case msg := <-rpc.delMsgCh:
-			if err := db.DB.DelMsgBySeqList(msg.UserID, msg.SeqList, msg.OperationID); err != nil {
-				log.NewError(msg.OperationID, utils.GetSelfFuncName(), "DelMsgBySeqList qrgs: ", msg.UserID, msg.SeqList, msg.OperationID, err.Error())
+			if unexistSeqList, err := db.DB.DelMsgBySeqList(msg.UserID, msg.SeqList, msg.OperationID); err != nil {
+				log.NewError(msg.OperationID, utils.GetSelfFuncName(), "DelMsgBySeqList args: ", msg.UserID, msg.SeqList, msg.OperationID, err.Error())
+				DeleteMessageNotification(msg.OpUserID, msg.UserID, unexistSeqList, msg.OperationID)
 			}
-			db.DataBases.DelMsgFromCache(msg.SeqList, msg.UserID, msg.OperationID)
+			db.DB.DelMsgFromCache(msg.UserID, msg.SeqList, msg.OperationID)
 		}
 	}
 }
diff --git a/pkg/common/db/mongoModel.go b/pkg/common/db/mongoModel.go
index 1e824c11b..0152941d3 100644
--- a/pkg/common/db/mongoModel.go
+++ b/pkg/common/db/mongoModel.go
@@ -85,7 +85,7 @@ func (d *DataBases) GetMinSeqFromMongo2(uid string) (MinSeq uint32, err error) {
 }
 
 // deleteMsgByLogic
-func (d *DataBases) DelMsgBySeqList(userID string, seqList []uint32, operationID string) (err error) {
+func (d *DataBases) DelMsgBySeqList(userID string, seqList []uint32, operationID string) (totalUnexistSeqList []uint32, err error) {
 	log.Debug(operationID, utils.GetSelfFuncName(), "args ", userID, seqList)
 	sortkeys.Uint32s(seqList)
 	suffixUserID2SubSeqList := func(uid string, seqList []uint32) map[string][]uint32 {
@@ -102,33 +102,38 @@ func (d *DataBases) DelMsgBySeqList(userID string, seqList []uint32, operationID
 		return t
 	}(userID, seqList)
 
+	lock := sync.Mutex{}
 	var wg sync.WaitGroup
 	wg.Add(len(suffixUserID2SubSeqList))
 	for k, v := range suffixUserID2SubSeqList {
 		go func(suffixUserID string, subSeqList []uint32, operationID string) {
-			if e := d.DelMsgBySeqListInOneDoc(suffixUserID, subSeqList, operationID); e != nil {
+			defer wg.Done()
+			unexistSeqList, err := d.DelMsgBySeqListInOneDoc(suffixUserID, subSeqList, operationID)
+			if err != nil {
 				log.Error(operationID, "DelMsgBySeqListInOneDoc failed ", e.Error(), suffixUserID, subSeqList)
-				err = e
+				return
 			}
+			lock.Lock()
+			totalUnexistSeqList = append(totalUnexistSeqList, unexistSeqList...)
+			lock.Unlock()
 			wg.Done()
 		}(k, v, operationID)
 	}
-	wg.Wait()
-	return err
+	return totalUnexistSeqList, err
 }
 
-func (d *DataBases) DelMsgBySeqListInOneDoc(suffixUserID string, seqList []uint32, operationID string) error {
+func (d *DataBases) DelMsgBySeqListInOneDoc(suffixUserID string, seqList []uint32, operationID string) ([]uint32, error) {
 	log.Debug(operationID, utils.GetSelfFuncName(), "args ", suffixUserID, seqList)
-	seqMsgList, indexList, err := d.GetMsgAndIndexBySeqListInOneMongo2(suffixUserID, seqList, operationID)
+	seqMsgList, indexList, unexistSeqList, err := d.GetMsgAndIndexBySeqListInOneMongo2(suffixUserID, seqList, operationID)
 	if err != nil {
-		return utils.Wrap(err, "")
+		return nil, utils.Wrap(err, "")
 	}
 	for i, v := range seqMsgList {
 		if err := d.ReplaceMsgByIndex(suffixUserID, v, operationID, indexList[i]); err != nil {
-			return utils.Wrap(err, "")
+			return nil, utils.Wrap(err, "")
 		}
 	}
-	return nil
+	return unexistSeqList, nil
 }
 
 // deleteMsgByLogic
@@ -302,13 +307,13 @@ func (d *DataBases) GetMsgBySeqListMongo2(uid string, seqList []uint32, operatio
 	return seqMsg, nil
 }
 
-func (d *DataBases) GetMsgAndIndexBySeqListInOneMongo2(suffixUserID string, seqList []uint32, operationID string) (seqMsg []*open_im_sdk.MsgData, indexList []int, err error) {
+func (d *DataBases) GetMsgAndIndexBySeqListInOneMongo2(suffixUserID string, seqList []uint32, operationID string) (seqMsg []*open_im_sdk.MsgData, indexList []int, unexistSeqList []uint32, err error) {
 	ctx, _ := context.WithTimeout(context.Background(), time.Duration(config.Config.Mongo.DBTimeout)*time.Second)
 	c := d.mongoClient.Database(config.Config.Mongo.DBDatabase).Collection(cChat)
 	sChat := UserChat{}
 	if err = c.FindOne(ctx, bson.M{"uid": suffixUserID}).Decode(&sChat); err != nil {
 		log.NewError(operationID, "not find seqUid", suffixUserID, err.Error())
-		return nil, nil, utils.Wrap(err, "")
+		return nil, nil, nil, utils.Wrap(err, "")
 	}
 	singleCount := 0
 	var hasSeqList []uint32
@@ -316,7 +321,7 @@ func (d *DataBases) GetMsgAndIndexBySeqListInOneMongo2(suffixUserID string, seqL
 		msg := new(open_im_sdk.MsgData)
 		if err = proto.Unmarshal(sChat.Msg[i].Msg, msg); err != nil {
 			log.NewError(operationID, "Unmarshal err", msg.String(), err.Error())
-			return nil, nil, err
+			return nil, nil, nil, err
 		}
 		if isContainInt32(msg.Seq, seqList) {
 			indexList = append(indexList, i)
@@ -328,8 +333,13 @@ func (d *DataBases) GetMsgAndIndexBySeqListInOneMongo2(suffixUserID string, seqL
 			}
 		}
 	}
-
-	return seqMsg, indexList, nil
+	for _, i := range seqList {
+		if isContainInt32(i, hasSeqList) {
+			continue
+		}
+		unexistSeqList = append(unexistSeqList, i)
+	}
+	return seqMsg, indexList, unexistSeqList, nil
 }
 
 func genExceptionMessageBySeqList(seqList []uint32) (exceptionMsg []*open_im_sdk.MsgData) {
@@ -915,8 +925,17 @@ func isContainInt32(target uint32, List []uint32) bool {
 		}
 	}
 	return false
-
 }
+
+func isNotContainInt32(target uint32, List []uint32) bool {
+	for _, i := range List {
+		if i == target {
+			return false
+		}
+	}
+	return true
+}
+
 func indexGen(uid string, seqSuffix uint32) string {
 	return uid + ":" + strconv.FormatInt(int64(seqSuffix), 10)
 }
diff --git a/pkg/common/db/redisModel.go b/pkg/common/db/redisModel.go
index 32ff05326..524d9ca56 100644
--- a/pkg/common/db/redisModel.go
+++ b/pkg/common/db/redisModel.go
@@ -314,7 +314,7 @@ func (d *DataBases) SetMessageToCache(msgList []*pbChat.MsgDataToMQ, uid string,
 	return nil
 }
 
-func (d *DataBases) DelMsgFromCache(seqList []uint32, uid, operationID string) {
+func (d *DataBases) DelMsgFromCache(uid string, seqList []uint32, operationID string) {
 	for _, seq := range seqList {
 		key := messageCache + uid + "_" + strconv.Itoa(int(seq))
 		result, err := redis.String(d.Exec("GET", key))
@@ -325,6 +325,7 @@ func (d *DataBases) DelMsgFromCache(seqList []uint32, uid, operationID string) {
 		log2.Debug(operationID, utils.GetSelfFuncName(), "del result", result)
 		var msg pbCommon.MsgData
 		err = utils.String2Pb(result, &msg)
+		log2.NewDebug(operationID, utils.GetSelfFuncName(), "msg", msg)
 		if err != nil {
 			log2.NewWarn(operationID, utils.GetSelfFuncName(), "string2Pb failed", msg, err.Error())
 			continue