diff --git a/DeedyDesigner/Deedy.Activity/ActionViewer.cs b/DeedyDesigner/Deedy.Activity/ActionViewer.cs
index b02dad9..a4eb42b 100644
--- a/DeedyDesigner/Deedy.Activity/ActionViewer.cs
+++ b/DeedyDesigner/Deedy.Activity/ActionViewer.cs
@@ -29,6 +29,9 @@ namespace Deedy.Activity
     [TemplatePart(Name = PART_StateDecorator, Type = typeof(ViewerStateDecorator))]
     public class ActionViewer : Control, IActionViewer
     {
+        public static double IndentRuler { get; set; } = 30;
+
+
         public const string PART_ItemsContainer = "PART_ItemsContainer";
         public const string PART_TitleContainer = "PART_TitleContainer";
         public const string PART_StateDecorator = "PART_StateDecorator";
@@ -509,6 +512,19 @@ namespace Deedy.Activity
         public static readonly DependencyPropertyKey MarginCorrection_TopBottomPropertyKey =
             DependencyProperty.RegisterReadOnly("MarginCorrection_TopBottom", typeof(Thickness), typeof(ActionViewer), new PropertyMetadata(new Thickness()));
         public static readonly DependencyProperty MarginCorrection_TopBottomProperty = MarginCorrection_TopBottomPropertyKey.DependencyProperty;
+
+        /// <summary>
+        /// 缩进边距修正
+        /// </summary>
+        public Thickness MarginCorrection_Indentation
+        {
+            get { return (Thickness)GetValue(MarginCorrection_IndentationProperty); }
+            protected internal set { SetValue(MarginCorrection_IndentationPropertyKey, value); }
+        }
+        public static readonly DependencyPropertyKey MarginCorrection_IndentationPropertyKey =
+            DependencyProperty.RegisterReadOnly("MarginCorrection_Indentation", typeof(Thickness), typeof(ActionViewer), new PropertyMetadata(new Thickness()));
+        public static readonly DependencyProperty MarginCorrection_IndentationProperty = MarginCorrection_IndentationPropertyKey.DependencyProperty;
+
         /// <summary>
         /// 动作节点
         /// </summary>
@@ -633,6 +649,9 @@ namespace Deedy.Activity
             switch (e.PropertyName)
             {
                 //TODO：处理托管的IActionElement节点的属性变更
+                case nameof(IElement.DepthLevel):
+                    this.MarginCorrection_Indentation = new Thickness(ActionViewer.IndentRuler * this.ActionElement.DepthLevel, 0, 0, 0);
+                    break;
                 case nameof(IActionElement.InstantInfo):
                     this.InstantInfo = this.ActionElement.InstantInfo;
                     break;
diff --git a/DeedyDesigner/Deedy.Activity/IActionViewer.cs b/DeedyDesigner/Deedy.Activity/IActionViewer.cs
index d5ea39e..f04d387 100644
--- a/DeedyDesigner/Deedy.Activity/IActionViewer.cs
+++ b/DeedyDesigner/Deedy.Activity/IActionViewer.cs
@@ -14,6 +14,9 @@ namespace Deedy.Activity
 {
     public interface IActionViewer : IActivity, INotifyPropertyChanged
     {
+        public static double IndentRuler { get; set; }
+        public static double LineHeight { get; set; }
+
         [AllowNull]
         public IActionElement ActionElement { get; set; }
         public Visibility ShowBreakHandle { get; }
@@ -46,6 +49,7 @@ namespace Deedy.Activity
         public Thickness MarginCorrection_Top { get; }
         public Thickness MarginCorrection_Bottom { get; }
         public Thickness MarginCorrection_TopBottom { get; }
+        public Thickness MarginCorrection_Indentation {  get; }
         public ImageSource ElementIcon { get; }
         [AllowNull]
         public StyleSelector StyleSelector { get; set; }