diff --git a/shared/domain/activityField/timeLimitRankField.ts b/shared/domain/activityField/timeLimitRankField.ts
index d3d9796ad..fa6a89dec 100644
--- a/shared/domain/activityField/timeLimitRankField.ts
+++ b/shared/domain/activityField/timeLimitRankField.ts
@@ -68,7 +68,7 @@ export class TimeLimitRankData extends ActivityBase {
         let dataObj: TimeLimitInDb = JSON.parse(data);
         this.rankType = dataObj.rankType;
         this.hid = dataObj.hid;
-        this.rankEndTime = moment(moment(this.beginTime).add(dataObj.rankEndDay, 'd').format(`YYYY-MM-DD ${this.rankEndTime}`)).valueOf() ;
+        this.rankEndTime = new Date(moment(this.beginTime).add(dataObj.rankEndDay, 'd').format(`YYYY-MM-DD ${dataObj.rankEndTime}`)).getTime() ;
         this.sendMailTime = this.rankEndTime + this.sendMailTime * 1000;
         for(let rank of dataObj.rankRewards) {
             this.rankRewards.push(new TimeLimitRankReward(rank));