diff --git a/plugin/mp4/api.go b/plugin/mp4/api.go
index 0ec60e0..286106b 100644
--- a/plugin/mp4/api.go
+++ b/plugin/mp4/api.go
@@ -184,7 +184,10 @@ func (p *MP4Plugin) download(w http.ResponseWriter, r *http.Request) {
 	p.Info("download", "streamPath", streamPath, "start", startTime, "end", endTime)
 	w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%s_%s_%s.mp4", streamPath, startTime.Format("20060102150405"), endTime.Format("20060102150405")))
 
-	p.DB.Find(&streams, "end_time>? AND start_time<? AND stream_path=? AND record_mode=0", startTime, endTime, streamPath)
+	queryRecord := m7s.RecordStream{
+		Mode: m7s.RecordModeAuto,
+	}
+	p.DB.Where(&queryRecord).Find(&streams, "end_time>? AND start_time<? AND stream_path=?", startTime, endTime, streamPath)
 	muxer := mp4.NewMuxer(0)
 	var n int
 	n, err = w.Write(box.MakeFtypBox(box.TypeISOM, 0x200, box.TypeISOM, box.TypeISO2, box.TypeAVC1, box.TypeMP41))
diff --git a/plugin/mp4/exception.go b/plugin/mp4/exception.go
index 58e3e28..c498a02 100644
--- a/plugin/mp4/exception.go
+++ b/plugin/mp4/exception.go
@@ -89,7 +89,7 @@ func (p *DeleteRecordTask) deleteOldestFile() {
 	//连续录像删除最旧的文件
 	for p.getDiskOutOfSpace(p.AutoOverWriteDiskPercent) {
 		queryRecord := m7s.RecordStream{
-			EventLevel: "1", // 查询条件：event_level = 1,非重要事件
+			EventLevel: m7s.EventLevelLow, // 查询条件：event_level = 1,非重要事件
 		}
 		var eventRecords []m7s.RecordStream
 		err := p.DB.Where(&queryRecord).Where("end_time != '1970-01-01 00:00:00'").Order("end_time ASC").Limit(1).Find(&eventRecords).Error
@@ -135,7 +135,10 @@ func (t *DeleteRecordTask) Tick(any) {
 	var eventRecords []m7s.RecordStream
 	expireTime := time.Now().AddDate(0, 0, -t.RecordFileExpireDays)
 	t.Debug("RecordFileExpireDays is set to auto delete oldestfile", "expireTime", expireTime.Format("2006-01-02 15:04:05"))
-	err := t.DB.Find(&eventRecords, "end_time < ? AND event_level=1 AND end_time != '1970-01-01 00:00:00'", expireTime).Error
+	queryRecord := m7s.RecordStream{
+		EventLevel: m7s.EventLevelLow, // 查询条件：event_level = low,非重要事件
+	}
+	err := t.DB.Where(&queryRecord).Find(&eventRecords, "end_time < ? AND end_time != '1970-01-01 00:00:00'", expireTime).Error
 	if err == nil {
 		for _, record := range eventRecords {
 			t.Info("RecordFileExpireDays is set to auto delete oldestfile", "ID", record.ID, "create time", record.EndTime, "filepath", record.FilePath)
diff --git a/plugin/mp4/pkg/record.go b/plugin/mp4/pkg/record.go
index 81e372d..de06390 100644
--- a/plugin/mp4/pkg/record.go
+++ b/plugin/mp4/pkg/record.go
@@ -82,18 +82,23 @@ type eventRecordCheck struct {
 
 func (t *eventRecordCheck) Run() (err error) {
 	var eventRecordStreams []m7s.RecordStream
-	t.DB.Find(&eventRecordStreams, "record_mode=1 AND event_level=0 AND stream_path=?", t.streamPath) //搜索事件录像，且为重要事件（无法自动删除）
+	queryRecord := m7s.RecordStream{
+		EventLevel: m7s.EventLevelHigh,
+		Mode:       m7s.RecordModeEvent,
+	}
+	t.DB.Where(&queryRecord).Find(&eventRecordStreams, "stream_path=?", t.streamPath) //搜索事件录像，且为重要事件（无法自动删除）
 	if len(eventRecordStreams) > 0 {
 		for _, recordStream := range eventRecordStreams {
 			var unimportantEventRecordStreams []m7s.RecordStream
+			queryRecord.EventLevel = m7s.EventLevelLow
 			query := `(start_time BETWEEN ? AND ?)
 							OR (end_time BETWEEN ? AND ?) 
 							OR (? BETWEEN start_time AND end_time) 
-							OR (? BETWEEN start_time AND end_time) AND event_level=1 AND stream_path=? `
-			t.DB.Where(query, recordStream.StartTime, recordStream.EndTime, recordStream.StartTime, recordStream.EndTime, recordStream.StartTime, recordStream.EndTime, recordStream.StreamPath).Find(&unimportantEventRecordStreams)
+							OR (? BETWEEN start_time AND end_time) AND stream_path=? `
+			t.DB.Where(&queryRecord).Where(query, recordStream.StartTime, recordStream.EndTime, recordStream.StartTime, recordStream.EndTime, recordStream.StartTime, recordStream.EndTime, recordStream.StreamPath).Find(&unimportantEventRecordStreams)
 			if len(unimportantEventRecordStreams) > 0 {
 				for _, unimportantEventRecordStream := range unimportantEventRecordStreams {
-					unimportantEventRecordStream.EventLevel = "0"
+					unimportantEventRecordStream.EventLevel = m7s.EventLevelHigh
 					t.DB.Save(&unimportantEventRecordStream)
 				}
 			}
diff --git a/puller.go b/puller.go
index b8ae58f..025f997 100644
--- a/puller.go
+++ b/puller.go
@@ -208,7 +208,10 @@ func (p *RecordFilePuller) Start() (err error) {
 	if p.PullStartTime, p.PullEndTime, err = util.TimeRangeQueryParse(p.PullJob.Args); err != nil {
 		return
 	}
-	tx := p.PullJob.Plugin.DB.Find(&p.Streams, "end_time>=? AND start_time<=? AND stream_path=? AND record_mode=0", p.PullStartTime, p.PullEndTime, p.PullJob.RemoteURL)
+	queryRecord := RecordStream{
+		Mode: EventLevelHigh,
+	}
+	tx := p.PullJob.Plugin.DB.Where(&queryRecord).Find(&p.Streams, "end_time>=? AND start_time<=? AND stream_path=?", p.PullStartTime, p.PullEndTime, p.PullJob.RemoteURL)
 	if tx.Error != nil {
 		return tx.Error
 	}
diff --git a/recoder.go b/recoder.go
index 7a14295..3692a20 100644
--- a/recoder.go
+++ b/recoder.go
@@ -15,9 +15,12 @@ import (
 const (
 	RecordModeAuto  RecordMode = "auto"
 	RecordModeEvent RecordMode = "event"
+	EventLevelLow   EventLevel = "low"
+	EventLevelHigh  EventLevel = "high"
 )
 
 type (
+	EventLevel = string
 	RecordMode = string
 	IRecorder  interface {
 		task.ITask
@@ -39,7 +42,7 @@ type (
 		BeforeDuration time.Duration `json:"beforeDuration" desc:"事件前缓存时长"`
 		AfterDuration  time.Duration `json:"afterDuration" desc:"事件后缓存时长"`
 		EventDesc      string        `json:"eventDesc" desc:"事件描述"`
-		EventLevel     string        `json:"eventLevel" desc:"事件级别"`
+		EventLevel     EventLevel    `json:"eventLevel" desc:"事件级别"`
 		EventName      string        `json:"eventName" desc:"事件名称"`
 	}
 	DefaultRecorder struct {
@@ -57,7 +60,7 @@ type (
 		Filename               string        `json:"fileName" desc:"文件名" gorm:"type:varchar(255);comment:文件名"`
 		EventDesc              string        `json:"eventDesc" desc:"事件描述" gorm:"type:varchar(255);comment:事件描述"`
 		Type                   string        `json:"type" desc:"录像文件类型" gorm:"type:varchar(255);comment:录像文件类型,flv,mp4,raw,fmp4,hls"`
-		EventLevel             string        `json:"eventLevel" desc:"事件级别" gorm:"type:varchar(255);comment:事件级别,0表示重要事件，无法删除且表示无需自动删除,1表示非重要事件,达到自动删除时间后，自动删除;default:'1'"`
+		EventLevel             EventLevel    `json:"eventLevel" desc:"事件级别" gorm:"type:varchar(255);comment:事件级别,high表示重要事件，无法删除且表示无需自动删除,low表示非重要事件,达到自动删除时间后，自动删除;default:'low'"`
 		FilePath               string
 		StreamPath             string
 		AudioCodec, VideoCodec string