diff --git a/AntJob.Data/Ant.htm b/AntJob.Data/Ant.htm
index 9d0c46c..032defd 100644
--- a/AntJob.Data/Ant.htm
+++ b/AntJob.Data/Ant.htm
@@ -396,6 +396,17 @@
             <td>客户端登录到哪个服务端，IP加端口</td>
         </tr>
 
+        <tr>
+            <td>Enable</td>
+            <td>启用</td>
+            <td>Boolean</td>
+            <td></td>
+            <td></td>
+            <td></td>
+            <td>N</td>
+            <td>是否允许申请任务</td>
+        </tr>
+
         <tr>
             <td>Tasks</td>
             <td>任务数</td>
diff --git a/AntJob.Data/Entity/应用在线.cs b/AntJob.Data/Entity/应用在线.cs
index 0574c1b..2a7d2f8 100644
--- a/AntJob.Data/Entity/应用在线.cs
+++ b/AntJob.Data/Entity/应用在线.cs
@@ -96,6 +96,14 @@ public partial class AppOnline
     [BindColumn("Server", "服务端。客户端登录到哪个服务端，IP加端口", "")]
     public String Server { get => _Server; set { if (OnPropertyChanging("Server", value)) { _Server = value; OnPropertyChanged("Server"); } } }
 
+    private Boolean _Enable;
+    /// <summary>启用。是否允许申请任务</summary>
+    [DisplayName("启用")]
+    [Description("启用。是否允许申请任务")]
+    [DataObjectField(false, false, false, 0)]
+    [BindColumn("Enable", "启用。是否允许申请任务", "")]
+    public Boolean Enable { get => _Enable; set { if (OnPropertyChanging("Enable", value)) { _Enable = value; OnPropertyChanged("Enable"); } } }
+
     private Int32 _Tasks;
     /// <summary>任务数</summary>
     [DisplayName("任务数")]
@@ -215,6 +223,7 @@ public partial class AppOnline
             "Version" => _Version,
             "CompileTime" => _CompileTime,
             "Server" => _Server,
+            "Enable" => _Enable,
             "Tasks" => _Tasks,
             "Total" => _Total,
             "Success" => _Success,
@@ -242,6 +251,7 @@ public partial class AppOnline
                 case "Version": _Version = Convert.ToString(value); break;
                 case "CompileTime": _CompileTime = value.ToDateTime(); break;
                 case "Server": _Server = Convert.ToString(value); break;
+                case "Enable": _Enable = value.ToBoolean(); break;
                 case "Tasks": _Tasks = value.ToInt(); break;
                 case "Total": _Total = value.ToLong(); break;
                 case "Success": _Success = value.ToLong(); break;
@@ -305,6 +315,9 @@ public partial class AppOnline
         /// <summary>服务端。客户端登录到哪个服务端，IP加端口</summary>
         public static readonly Field Server = FindByName("Server");
 
+        /// <summary>启用。是否允许申请任务</summary>
+        public static readonly Field Enable = FindByName("Enable");
+
         /// <summary>任务数</summary>
         public static readonly Field Tasks = FindByName("Tasks");
 
@@ -374,6 +387,9 @@ public partial class AppOnline
         /// <summary>服务端。客户端登录到哪个服务端，IP加端口</summary>
         public const String Server = "Server";
 
+        /// <summary>启用。是否允许申请任务</summary>
+        public const String Enable = "Enable";
+
         /// <summary>任务数</summary>
         public const String Tasks = "Tasks";
 
diff --git a/AntJob.Data/Model.xml b/AntJob.Data/Model.xml
index e8a330a..c0ee0f9 100644
--- a/AntJob.Data/Model.xml
+++ b/AntJob.Data/Model.xml
@@ -78,6 +78,7 @@
         <Column Name="Version" DataType="String" Description="版本。客户端" />
         <Column Name="CompileTime" DataType="DateTime" Description="编译时间" />
         <Column Name="Server" DataType="String" Description="服务端。客户端登录到哪个服务端，IP加端口" />
+        <Column Name="Enable" DataType="Boolean" Description="启用。是否允许申请任务" />
         <Column Name="Tasks" DataType="Int32" Description="任务数" />
         <Column Name="Total" DataType="Int64" Description="总数" />
         <Column Name="Success" DataType="Int64" Description="成功" />
diff --git a/AntJob.Server/Services/AppService.cs b/AntJob.Server/Services/AppService.cs
index 0fe205c..b492c2e 100644
--- a/AntJob.Server/Services/AppService.cs
+++ b/AntJob.Server/Services/AppService.cs
@@ -186,7 +186,7 @@ public class AppService
     public AppOnline GetOnline(App app, String ip)
     {
         var ins = $"{app.Name}@{ip}";
-        var online = AppOnline.FindByInstance(ins) ?? new AppOnline { CreateIP = ip };
+        var online = AppOnline.FindByInstance(ins) ?? new AppOnline { Enable = true, CreateIP = ip };
         online.AppID = app.ID;
         online.Instance = ins;
 
diff --git a/AntJob.Server/Services/JobService.cs b/AntJob.Server/Services/JobService.cs
index 7c128d8..b9bbfe8 100644
--- a/AntJob.Server/Services/JobService.cs
+++ b/AntJob.Server/Services/JobService.cs
@@ -152,7 +152,9 @@ public class JobService(AppService appService, ICacheProvider cacheProvider, ITr
         if (job == null) throw new XException($"应用[{app.ID}/{app.Name}]下未找到作业[{jobName}]");
         if (job.DataTime.Year <= 2000) throw new XException("作业[{0}/{1}]未设置数据时间", job.ID, job.Name);
 
+        // 应用在线，但可能禁止向其分配任务
         var online = _appService.GetOnline(app, ip);
+        if (!online.Enable) return [];
 
         var list = new List<JobTask>();