diff --git a/xxl-job-admin/src/main/java/com/xxl/job/core/util/DynamicSchedulerUtil.java b/xxl-job-admin/src/main/java/com/xxl/job/core/util/DynamicSchedulerUtil.java
index 75c3f4d9..fdd1f6a4 100644
--- a/xxl-job-admin/src/main/java/com/xxl/job/core/util/DynamicSchedulerUtil.java
+++ b/xxl-job-admin/src/main/java/com/xxl/job/core/util/DynamicSchedulerUtil.java
@@ -104,8 +104,8 @@ public final class DynamicSchedulerUtil implements InitializingBean {
             return false;
         }
         
-        // CronTrigger : TriggerKey + cronExpression
-        CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(cronExpression);
+        // CronTrigger : TriggerKey + cronExpression	// withMisfireHandlingInstructionDoNothing 忽略掉调度终止过程中忽略的调度
+        CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(cronExpression).withMisfireHandlingInstructionDoNothing();
         CronTrigger cronTrigger = TriggerBuilder.newTrigger().withIdentity(triggerKey).withSchedule(cronScheduleBuilder).build();
 
         // JobDetail : jobClass
@@ -131,7 +131,7 @@ public final class DynamicSchedulerUtil implements InitializingBean {
         boolean result = false;
         if (scheduler.checkExists(triggerKey)) {
             // CronTrigger : TriggerKey + cronExpression
-            CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(cronExpression);
+            CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(cronExpression).withMisfireHandlingInstructionDoNothing();
             CronTrigger cronTrigger = TriggerBuilder.newTrigger().withIdentity(triggerKey).withSchedule(cronScheduleBuilder).build();
             
             Date date = scheduler.rescheduleJob(triggerKey, cronTrigger);
diff --git a/xxl-job-admin/src/main/resources/applicationcontext-trigger-db.xml b/xxl-job-admin/src/main/resources/applicationcontext-trigger-db.xml
index 58e268f7..edc52237 100644
--- a/xxl-job-admin/src/main/resources/applicationcontext-trigger-db.xml
+++ b/xxl-job-admin/src/main/resources/applicationcontext-trigger-db.xml
@@ -11,7 +11,8 @@
 
 	<bean id="quartzScheduler" lazy-init="false" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
 		<property name="dataSource" ref="dataSource" />
-        <property name="autoStartup" value="true" />
+        <property name="autoStartup" value="true" />	<!--自动启动 -->
+        <property name="startupDelay" value="20" />		<!--延时启动 -->
 		<property name="applicationContextSchedulerContextKey"  value="applicationContextKey" /> 
         <property name="configLocation" value="classpath:quartz.properties"/>
 	</bean>
diff --git a/xxl-job-simple/src/main/java/com/xxl/job/service/job/DemoJobBean.java b/xxl-job-simple/src/main/java/com/xxl/job/service/job/DemoJobBean.java
index 5345578a..77aa8a2a 100644
--- a/xxl-job-simple/src/main/java/com/xxl/job/service/job/DemoJobBean.java
+++ b/xxl-job-simple/src/main/java/com/xxl/job/service/job/DemoJobBean.java
@@ -3,7 +3,9 @@ package com.xxl.job.service.job;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Map.Entry;
+import java.util.concurrent.TimeUnit;
 
+import org.quartz.DisallowConcurrentExecution;
 import org.quartz.JobExecutionContext;
 import org.quartz.JobExecutionException;
 import org.slf4j.Logger;
@@ -14,6 +16,8 @@ import org.springframework.scheduling.quartz.QuartzJobBean;
  * http job bean
  * @author xuxueli 2015-12-17 18:20:34
  */
+
+@DisallowConcurrentExecution	// 取消并发执行；线程数要多配置几个，否则不生效；
 public class DemoJobBean extends QuartzJobBean {
 	private static Logger logger = LoggerFactory.getLogger(DemoJobBean.class);
 
@@ -33,6 +37,12 @@ public class DemoJobBean extends QuartzJobBean {
 			}
 		}
 		
+		try {
+			TimeUnit.SECONDS.sleep(5);
+		} catch (InterruptedException e) {
+			e.printStackTrace();
+		}
+		
 		logger.info(">>>>>>>>>>> xxl-job run :jobId:{}, group:{}, jobDataMap:{}", 
 				new Object[]{triggerKey, triggerGroup, jobDataMap});
     }