diff --git a/Data/Entities/DbMqtt.cs b/Data/Entities/DbMqtt.cs
index 7a6aefe..313cdaf 100644
--- a/Data/Entities/DbMqtt.cs
+++ b/Data/Entities/DbMqtt.cs
@@ -81,4 +81,10 @@ public class DbMqtt
     /// MQTT客户端登录用户名。
     /// </summary>
     public string UserName { get; set; } = String.Empty;
+
+    /// <summary>
+    /// 关联的变量数据列表。
+    /// </summary>
+    [Navigate(typeof(DbVariableDataMqtt), "MqttId", "VariableDataId")]
+    public List<DbVariableData>? VariableDatas { get; set; }
 }
\ No newline at end of file
diff --git a/Data/Entities/DbVariableData.cs b/Data/Entities/DbVariableData.cs
index 33adeca..813d918 100644
--- a/Data/Entities/DbVariableData.cs
+++ b/Data/Entities/DbVariableData.cs
@@ -140,6 +140,6 @@ public class DbVariableData
     /// <summary>
     /// 关联的MQTT配置列表。
     /// </summary>
-    [SugarColumn(IsNullable = true)]
+    [Navigate(typeof(DbVariableDataMqtt), "VariableDataId", "MqttId")]
     public List<DbMqtt>? Mqtts { get; set; }
 }
\ No newline at end of file
diff --git a/Data/Entities/DbVariableDataMqtt.cs b/Data/Entities/DbVariableDataMqtt.cs
new file mode 100644
index 0000000..9f0b9bc
--- /dev/null
+++ b/Data/Entities/DbVariableDataMqtt.cs
@@ -0,0 +1,19 @@
+using SqlSugar;
+
+namespace PMSWPF.Data.Entities;
+
+[SugarTable("VariableDataMqtt")]
+public class DbVariableDataMqtt
+{
+    [SugarColumn(IsPrimaryKey = true)]
+    public int VariableDataId { get; set; }
+
+    [SugarColumn(IsPrimaryKey = true)]
+    public int MqttId { get; set; }
+
+    [Navigate(NavigateType.ManyToOne, nameof(VariableDataId))]
+    public DbVariableData VariableData { get; set; }
+
+    [Navigate(NavigateType.ManyToOne, nameof(MqttId))]
+    public DbMqtt Mqtt { get; set; }
+}
\ No newline at end of file