diff --git a/Modbus.Net/Modbus.Net/Job/JobChainingJobLIstenerWithDataMapRepeated.cs b/Modbus.Net/Modbus.Net/Job/JobChainingJobLIstenerWithDataMapRepeated.cs
new file mode 100644
index 0000000..45833de
--- /dev/null
+++ b/Modbus.Net/Modbus.Net/Job/JobChainingJobLIstenerWithDataMapRepeated.cs
@@ -0,0 +1,50 @@
+using Quartz;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Modbus.Net
+{
+    /// <summary>
+    ///     Repeated JobChaningJobListener
+    /// </summary>
+    public class JobChainingJobLIstenerWithDataMapRepeated : JobChainingJobListenerWithDataMap
+    {
+        /// <summary>
+        /// JobChaningJobListener with DataMap passing from parent job to next job
+        /// </summary>
+        /// <param name="name">Job name</param>
+        /// <param name="overwriteKeys">If key is overwritable, parent job will pass the value to next job event next job contains that key</param>
+        public JobChainingJobLIstenerWithDataMapRepeated(string name, ICollection<string> overwriteKeys) : base(name, overwriteKeys)
+        {
+        }
+
+#nullable enable
+        /// <inheritdoc />
+        public override async Task JobWasExecuted(IJobExecutionContext context,
+            JobExecutionException? jobException,
+            CancellationToken cancellationToken = default)
+        {
+            await base.JobWasExecuted(context, jobException, cancellationToken);
+            ChainLinks.TryGetValue(context.JobDetail.Key, out var sj);
+            if (sj == null)
+            {
+                var chainRoot = context.JobDetail.Key;
+                var chainParent = ChainLinks.FirstOrDefault(p => p.Value == context.JobDetail.Key).Key;               
+                while (chainParent != null)
+                {
+                    chainRoot = chainParent;
+                    chainParent = ChainLinks.FirstOrDefault(p => p.Value == chainParent).Key;
+                }
+
+                var sjJobDetail = await context.Scheduler.GetJobDetail(chainRoot);
+                await context.Scheduler.AddJob(sjJobDetail!, true, false);
+                await context.Scheduler.TriggerJob(chainRoot, cancellationToken).ConfigureAwait(false);
+            }
+        }
+#nullable disable
+    }
+}
diff --git a/Modbus.Net/Modbus.Net/Job/JobChainingJobListenerWithDataMap.cs b/Modbus.Net/Modbus.Net/Job/JobChainingJobListenerWithDataMap.cs
index d25a122..edf8ed1 100644
--- a/Modbus.Net/Modbus.Net/Job/JobChainingJobListenerWithDataMap.cs
+++ b/Modbus.Net/Modbus.Net/Job/JobChainingJobListenerWithDataMap.cs
@@ -23,10 +23,13 @@ namespace Modbus.Net
         {
             Name = name;
             OverWriteKeys = overwriteKeys;
-            chainLinks = new Dictionary<JobKey, JobKey>();
+            ChainLinks = new Dictionary<JobKey, JobKey>();
         }
 
-        private readonly Dictionary<JobKey, JobKey> chainLinks;
+        /// <summary>
+        /// Job chain links
+        /// </summary>
+        protected readonly Dictionary<JobKey, JobKey> ChainLinks;
 
         /// <inheritdoc />
         public override string Name { get; }
@@ -44,7 +47,7 @@ namespace Modbus.Net
         /// <param name="secondJob">a JobKey with the name and group of the follow-up job</param>
         public void AddJobChainLink(JobKey firstJob, JobKey secondJob)
         {
-            chainLinks.Add(firstJob, secondJob);
+            ChainLinks.Add(firstJob, secondJob);
         }
 
 #nullable enable
@@ -53,7 +56,7 @@ namespace Modbus.Net
             JobExecutionException? jobException,
             CancellationToken cancellationToken = default)
         {
-            chainLinks.TryGetValue(context.JobDetail.Key, out var sj);
+            ChainLinks.TryGetValue(context.JobDetail.Key, out var sj);
 
             if (sj == null)
             {
diff --git a/Modbus.Net/Modbus.Net/Job/MachineJobScheduler.cs b/Modbus.Net/Modbus.Net/Job/MachineJobScheduler.cs
index cfc366b..30ad145 100644
--- a/Modbus.Net/Modbus.Net/Job/MachineJobScheduler.cs
+++ b/Modbus.Net/Modbus.Net/Job/MachineJobScheduler.cs
@@ -57,7 +57,14 @@ namespace Modbus.Net
             IScheduler scheduler = await StdSchedulerFactory.GetDefaultScheduler();
 
             ITrigger trigger;
-            if (count >= 0)
+            if (interval <= 0)
+            {
+                trigger = TriggerBuilder.Create()
+                    .WithIdentity(triggerKey, "Modbus.Net.DataQuery.Group." + triggerKey)
+                    .StartNow()
+                    .Build();
+            }
+            else if (count >= 0)
                 trigger = TriggerBuilder.Create()
                     .WithIdentity(triggerKey, "Modbus.Net.DataQuery.Group." + triggerKey)
                     .StartNow()
@@ -70,7 +77,15 @@ namespace Modbus.Net
                     .WithSimpleSchedule(b => b.WithInterval(TimeSpan.FromSeconds(interval)).RepeatForever())
                     .Build();
 
-            var listener = new JobChainingJobListenerWithDataMap("Modbus.Net.DataQuery.Chain." + triggerKey, new string[2] { "Value", "SetValue" });
+            IJobListener listener;
+            if (interval <= 0)
+            {
+                listener = new JobChainingJobLIstenerWithDataMapRepeated("Modbus.Net.DataQuery.Chain." + triggerKey, new string[2] { "Value", "SetValue" });
+            }
+            else
+            {
+                listener = new JobChainingJobListenerWithDataMap("Modbus.Net.DataQuery.Chain." + triggerKey, new string[2] { "Value", "SetValue" });
+            }
             scheduler.ListenerManager.AddJobListener(listener, GroupMatcher<JobKey>.GroupEquals("Modbus.Net.DataQuery.Group." + triggerKey));
 
             if (await scheduler.GetTrigger(new TriggerKey(triggerKey)) != null)
@@ -344,9 +359,9 @@ namespace Modbus.Net
         ///     执行任务
         /// </summary>
         /// <returns></returns>
-        public async Task Run()
+        public Task Run()
         {
-            await _scheduler.Start();
+            return _scheduler.Start();
         }
     }
 
diff --git a/Samples/MachineJob/Worker.cs b/Samples/MachineJob/Worker.cs
index e97f132..9009b17 100644
--- a/Samples/MachineJob/Worker.cs
+++ b/Samples/MachineJob/Worker.cs
@@ -13,7 +13,7 @@ namespace MachineJob.Service
             _logger = logger;
         }
 
-        protected override Task ExecuteAsync(CancellationToken stoppingToken)
+        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
         {
             //1. Ö±½ÓCoding
             //List<AddressUnit> _addresses = new List<AddressUnit>
@@ -61,10 +61,18 @@ namespace MachineJob.Service
             //}
 
             //4. ʹÓÃMultipleMachinesJobScheduler
-            return Task.Run(() => MultipleMachinesJobScheduler.RunScheduler(machines, async (machine, scheduler) =>
+            //return Task.Run(() => MultipleMachinesJobScheduler.RunScheduler(machines, async (machine, scheduler) =>
+            //{
+            //    /await scheduler.From(machine.Id + ".From", machine, MachineDataType.Name).Result.Query(machine.Id + ".ConsoleQuery", QueryConsole).Result.To(machine.Id + ".To", machine).Result.Deal(machine.Id + ".Deal", OnSuccess, OnFailure).Result.Run();
+            //}, -1, 10));
+
+            //5. ²»ÉèÖù̶¨Ê±¼ä£¬Á¬Ðø´¥·¢Job
+            foreach (var machine in machines)
             {
-                await scheduler.From(machine.Id + ".From", machine, MachineDataType.Name).Result.Query(machine.Id + ".ConsoleQuery", QueryConsole).Result.To(machine.Id + ".To", machine).Result.Deal(machine.Id + ".Deal", OnSuccess, OnFailure).Result.Run();
-            }, -1, 10));
+                var scheduler = await MachineJobSchedulerCreator<IMachineMethodDatas, string, double>.CreateScheduler(machine.Id, 0, 0);
+                var job = scheduler.From(machine.Id + ".From", machine, MachineDataType.Name).Result.Query(machine.Id + ".ConsoleQuery", QueryConsole).Result.To(machine.Id + ".To", machine).Result.Deal(machine.Id + ".Deal", OnSuccess, OnFailure).Result;
+                await job.Run();
+            }
         }
 
         public override Task StopAsync(CancellationToken cancellationToken)