diff --git a/public/react/src/modules/courses/busyWork/CommonWorkSetting.js b/public/react/src/modules/courses/busyWork/CommonWorkSetting.js
index ab00f3c00..1574d692d 100644
--- a/public/react/src/modules/courses/busyWork/CommonWorkSetting.js
+++ b/public/react/src/modules/courses/busyWork/CommonWorkSetting.js
@@ -1018,7 +1018,7 @@ class CommonWorkSetting extends Component{
                       placeholder="请选择发布时间"
                       id={"startime"}
                       width={"210px"}
-                      value={publish_time===null||publish_time===""?"":moment(publish_time, dateFormat)}
+                      value={!publish_time?"":moment(publish_time, dateFormat)}
                       onChange={this.onChangeTimepublish}
                       // disabled={this.props.isSuperAdmin()?false:publish_time_type===true?true:false}
                       disabled={moment(this.state.init_publish_time) < moment() || noAuth}
@@ -1048,7 +1048,7 @@ class CommonWorkSetting extends Component{
                   placeholder="请选择截止时间"
                   id={"endTime"}
                   width={"210px"}
-                  value={end_time===null||end_time===""?"":moment(end_time, dateFormat)}
+                  value={!end_time?"":moment(end_time, dateFormat)}
                   onChange={this.onChangeTimeend}
                   disabled={this.props.isSuperAdmin()?false:end_time_type===true?true:false}
                   disabled={moment(this.state.init_end_time) < moment() || noAuth}
@@ -1117,7 +1117,7 @@ class CommonWorkSetting extends Component{
                     placeholder="请选择结束时间"
                     id={"enTime"}
                     width={"210px"}
-                    value={late_time===null||late_time===""? undefined :moment(late_time, dateFormat)}
+                    value={!late_time ? undefined :moment(late_time, dateFormat)}
                     onChange={this.onChangeTimelatetime}
                     disabledTime={disabledDateTime}
                     disabled={!allow_late || noAuth || moment(init_late_time) < moment()}
@@ -1165,7 +1165,7 @@ class CommonWorkSetting extends Component{
                     placeholder="请选择匿名开启时间"
                     id={"startime"}
                     width={"210px"}
-                    value={evaluation_start===null||evaluation_start===""?"":moment(evaluation_start, dateFormat)}
+                    value={!evaluation_start ?"":moment(evaluation_start, dateFormat)}
                     onChange={this.onChangeEvaluationStart}
                     disabled={ (anonymous_comment && !noAuth ? false : true) || moment(init_evaluation_start) < moment() }
                     // disabledDate={ (evaluation_start) => 
@@ -1194,7 +1194,7 @@ class CommonWorkSetting extends Component{
                     placeholder="请选择匿名结束时间"
                     id={"endtime"}
                     width={"210px"}
-                    value={evaluation_end===null||evaluation_end===""?"":moment(evaluation_end, dateFormat)}
+                    value={!evaluation_end ?"":moment(evaluation_end, dateFormat)}
                     onChange={this.onChangeEvaluationEnd}
                     disabledTime={disabledDateTime}
                     disabled={(anonymous_comment && !noAuth ? false : true) || moment(init_evaluation_end) < moment()}
@@ -1289,7 +1289,7 @@ class CommonWorkSetting extends Component{
                     placeholder="请选择申诉结束时间"
                     id={"endtime"}
                     width={"210px"}
-                    value={appeal_time===null||appeal_time===""?"":moment(appeal_time, dateFormat)}
+                    value={!appeal_time?"":moment(appeal_time, dateFormat)}
                     onChange={this.appeal_time_change}
                     disabled={ (anonymous_appeal && !noAuth ? false : true) || moment(init_appeal_time) < moment()}
                   />