diff --git a/model/alerting/rule.go b/model/alerting/rule.go
index d8267bb3..508f8869 100644
--- a/model/alerting/rule.go
+++ b/model/alerting/rule.go
@@ -21,7 +21,7 @@ type Rule struct {
 	Schedule Schedule `json:"schedule" elastic_mapping:"schedule:{type:object}"`
 	LastNotificationTime time.Time `json:"-" elastic_mapping:"last_notification_time:{type:date}"`
 	LastTermStartTime time.Time `json:"-"` //标识最近一轮告警的开始时间
-	LastEscalationTime time.Time `json:"-"` //标识最近一轮告警的开始时间
+	LastEscalationTime time.Time `json:"-"` //标识最近一次告警升级发送通知的时间
 	SearchText string `json:"-" elastic_mapping:"search_text:{type:text,index_prefixes:{},index_phrases:true, analyzer:suggest_text_search }"`
 }
 
diff --git a/plugin/api/alerting/alert.go b/plugin/api/alerting/alert.go
index 049c2de5..c8325e1a 100644
--- a/plugin/api/alerting/alert.go
+++ b/plugin/api/alerting/alert.go
@@ -47,6 +47,16 @@ func (h *AlertAPI) acknowledgeAlert(w http.ResponseWriter, req *http.Request, ps
 	body := struct {
 		AlertIDs []string `json:"ids"`
 	}{}
+	err := h.DecodeJSON(req,  &body)
+	if err != nil {
+		h.WriteError(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	if len(body.AlertIDs) == 0 {
+		h.WriteError(w, "alert ids should not be empty", http.StatusInternalServerError)
+		return
+	}
 	queryDsl := util.MapStr{
 		"query": util.MapStr{
 			"terms": util.MapStr{
@@ -57,7 +67,7 @@ func (h *AlertAPI) acknowledgeAlert(w http.ResponseWriter, req *http.Request, ps
 			"source": fmt.Sprintf("ctx._source['state'] = '%s'", alerting.AlertStateAcknowledge),
 		},
 	}
-	err := orm.UpdateBy(alerting.Alert{}, util.MustToJSONBytes(queryDsl))
+	err = orm.UpdateBy(alerting.Alert{}, util.MustToJSONBytes(queryDsl))
 	if err != nil {
 		h.WriteError(w, err.Error(), http.StatusInternalServerError)
 		log.Error(err)