diff --git a/Spine/SpineObject.cs b/Spine/SpineObject.cs
index 5854cc2..35d7761 100644
--- a/Spine/SpineObject.cs
+++ b/Spine/SpineObject.cs
@@ -167,6 +167,7 @@ namespace Spine
                 // 拷贝渲染设置
                 UsePma = other.UsePma;
                 Physics = other.Physics;
+                _animationState.TimeScale = other._animationState.TimeScale;
 
                 // 拷贝皮肤加载情况
                 _skinLoadStatus = other._skinLoadStatus.ToDictionary();
diff --git a/SpineViewer/Models/SpineObjectConfigModel.cs b/SpineViewer/Models/SpineObjectConfigModel.cs
index 8b92b71..58dc5fd 100644
--- a/SpineViewer/Models/SpineObjectConfigModel.cs
+++ b/SpineViewer/Models/SpineObjectConfigModel.cs
@@ -17,6 +17,8 @@ namespace SpineViewer.Models
 
         public string Physics { get; set; } = ISkeleton.Physics.Update.ToString();
 
+        public float TimeScale { get; set; } = 1f;
+
         public float Scale { get; set; } = 1f;
 
         public bool FlipX { get; set; }
@@ -54,5 +56,15 @@ namespace SpineViewer.Models
         public bool DebugPoints { get; set; }
 
         public bool DebugClippings { get; set; }
+
+    }
+
+    public class AnimationConfigModel
+    {
+        string Name { get; set; } = "";
+
+        float TimeScale { get; set; } = 1f;
+
+        float Alpha { get; set; } = 1f;
     }
 }
diff --git a/SpineViewer/Models/SpineObjectModel.cs b/SpineViewer/Models/SpineObjectModel.cs
index 71237f9..19e8d0b 100644
--- a/SpineViewer/Models/SpineObjectModel.cs
+++ b/SpineViewer/Models/SpineObjectModel.cs
@@ -129,6 +129,12 @@ namespace SpineViewer.Models
             set { lock (_lock) SetProperty(_spineObject.Physics, value, v => _spineObject.Physics = v); }
         }
 
+        public float TimeScale
+        {
+            get { lock (_lock) return _spineObject.AnimationState.TimeScale; }
+            set { lock (_lock) SetProperty(_spineObject.AnimationState.TimeScale, Math.Clamp(value, -100f, 100f), v => _spineObject.AnimationState.TimeScale = v); }
+        }
+
         /// <summary>
         /// 缩放倍数, 绝对值大小, 两个方向大小不一致时返回 -1, 设置时不会影响正负号
         /// </summary>
@@ -388,6 +394,7 @@ namespace SpineViewer.Models
 
                         UsePma = _spineObject.UsePma,
                         Physics = _spineObject.Physics.ToString(),
+                        TimeScale = _spineObject.AnimationState.TimeScale,
 
                         DebugTexture = _spineObject.DebugTexture,
                         DebugBounds = _spineObject.DebugBounds,
@@ -427,6 +434,7 @@ namespace SpineViewer.Models
                     SetProperty(_spineObject.Skeleton.Y, value.Y, v => _spineObject.Skeleton.Y = v, nameof(Y));
                     SetProperty(_spineObject.UsePma, value.UsePma, v => _spineObject.UsePma = v, nameof(UsePma));
                     SetProperty(_spineObject.Physics, Enum.Parse<ISkeleton.Physics>(value.Physics ?? "Update", true), v => _spineObject.Physics = v, nameof(Physics));
+                    SetProperty(_spineObject.AnimationState.TimeScale, value.TimeScale, v => _spineObject.AnimationState.TimeScale = v, nameof(TimeScale));
 
                     foreach (var name in _spineObject.Data.Skins.Select(v => v.Name).Except(value.LoadedSkins))
                         if (_spineObject.SetSkinStatus(name, false))
diff --git a/SpineViewer/Resources/Strings/en.xaml b/SpineViewer/Resources/Strings/en.xaml
index 06cdd98..dcad18b 100644
--- a/SpineViewer/Resources/Strings/en.xaml
+++ b/SpineViewer/Resources/Strings/en.xaml
@@ -64,6 +64,8 @@
     <s:String x:Key="Str_IsShown">Show</s:String>
     <s:String x:Key="Str_UsePma">Premultiply Alpha</s:String>
     <s:String x:Key="Str_Physics">Physics</s:String>
+    <s:String x:Key="Str_TimeScale">Time Scale</s:String>
+    <s:String x:Key="Str_TimeScaleTootltip">Time scale for a single model; a negative value plays the animation in reverse.</s:String>
 
     <s:String x:Key="Str_Transform">Transform</s:String>
     <s:String x:Key="Str_Scale">Scale</s:String>
diff --git a/SpineViewer/Resources/Strings/ja.xaml b/SpineViewer/Resources/Strings/ja.xaml
index 048d919..2d16f34 100644
--- a/SpineViewer/Resources/Strings/ja.xaml
+++ b/SpineViewer/Resources/Strings/ja.xaml
@@ -64,6 +64,8 @@
     <s:String x:Key="Str_IsShown">表示</s:String>
     <s:String x:Key="Str_UsePma">プレマルチプライドアルファ</s:String>
     <s:String x:Key="Str_Physics">物理</s:String>
+    <s:String x:Key="Str_TimeScale">時間スケール</s:String>
+    <s:String x:Key="Str_TimeScaleTootltip">単一モデルの時間スケール。負の値にするとアニメーションを逆再生します。</s:String>
 
     <s:String x:Key="Str_Transform">変換</s:String>
     <s:String x:Key="Str_Scale">スケール</s:String>
diff --git a/SpineViewer/Resources/Strings/zh.xaml b/SpineViewer/Resources/Strings/zh.xaml
index c0ce189..b72d87f 100644
--- a/SpineViewer/Resources/Strings/zh.xaml
+++ b/SpineViewer/Resources/Strings/zh.xaml
@@ -64,6 +64,8 @@
     <s:String x:Key="Str_IsShown">显示</s:String>
     <s:String x:Key="Str_UsePma">预乘Alpha通道</s:String>
     <s:String x:Key="Str_Physics">物理</s:String>
+    <s:String x:Key="Str_TimeScale">时间因子</s:String>
+    <s:String x:Key="Str_TimeScaleTootltip">单个模型的时间因子，取负数时可以倒放动画</s:String>
 
     <s:String x:Key="Str_Transform">变换</s:String>
     <s:String x:Key="Str_Scale">缩放</s:String>
diff --git a/SpineViewer/ViewModels/MainWindow/SpineObjectTabViewModel.cs b/SpineViewer/ViewModels/MainWindow/SpineObjectTabViewModel.cs
index 5e39f9a..1e74af2 100644
--- a/SpineViewer/ViewModels/MainWindow/SpineObjectTabViewModel.cs
+++ b/SpineViewer/ViewModels/MainWindow/SpineObjectTabViewModel.cs
@@ -74,6 +74,7 @@ namespace SpineViewer.ViewModels.MainWindow
                 OnPropertyChanged(nameof(IsShown));
                 OnPropertyChanged(nameof(UsePma));
                 OnPropertyChanged(nameof(Physics));
+                OnPropertyChanged(nameof(TimeScale));
 
                 OnPropertyChanged(nameof(Scale));
                 OnPropertyChanged(nameof(FlipX));
@@ -217,6 +218,25 @@ namespace SpineViewer.ViewModels.MainWindow
             }
         }
 
+        public float? TimeScale
+        {
+            get
+            {
+                if (_selectedObjects.Length <= 0) return null;
+                var val = _selectedObjects[0].TimeScale;
+                if (_selectedObjects.Skip(1).Any(it => it.TimeScale != val)) return null;
+                return val;
+            }
+
+            set
+            {
+                if (_selectedObjects.Length <= 0) return;
+                if (value is null) return;
+                foreach (var sp in _selectedObjects) sp.TimeScale = (float)value;
+                OnPropertyChanged();
+            }
+        }
+
         public float? Scale
         {
             get
@@ -595,35 +615,44 @@ namespace SpineViewer.ViewModels.MainWindow
             }
         }
 
-        /// <summary>
-        /// 监听单个模型属性发生变化, 则更新聚合属性值
-        /// </summary>
-        private void SingleModel_PropertyChanged(object? sender, PropertyChangedEventArgs e)
+        private static readonly Dictionary<string, string> _singleModelPropertyMap = new()
         {
-            if (e.PropertyName == nameof(SpineObjectModel.IsShown)) OnPropertyChanged(nameof(IsShown));
-            else if (e.PropertyName == nameof(SpineObjectModel.UsePma)) OnPropertyChanged(nameof(UsePma));
-            else if (e.PropertyName == nameof(SpineObjectModel.Physics)) OnPropertyChanged(nameof(Physics));
+            { nameof(SpineObjectModel.IsShown), nameof(IsShown) },
+            { nameof(SpineObjectModel.UsePma), nameof(UsePma) },
+            { nameof(SpineObjectModel.Physics), nameof(Physics) },
+            { nameof(SpineObjectModel.TimeScale), nameof(TimeScale) },
 
-            else if (e.PropertyName == nameof(SpineObjectModel.Scale)) OnPropertyChanged(nameof(Scale));
-            else if (e.PropertyName == nameof(SpineObjectModel.FlipX)) OnPropertyChanged(nameof(FlipX));
-            else if (e.PropertyName == nameof(SpineObjectModel.FlipY)) OnPropertyChanged(nameof(FlipY));
-            else if (e.PropertyName == nameof(SpineObjectModel.X)) OnPropertyChanged(nameof(X));
-            else if (e.PropertyName == nameof(SpineObjectModel.Y)) OnPropertyChanged(nameof(Y));
+            { nameof(SpineObjectModel.Scale), nameof(Scale) },
+            { nameof(SpineObjectModel.FlipX), nameof(FlipX) },
+            { nameof(SpineObjectModel.FlipY), nameof(FlipY) },
+            { nameof(SpineObjectModel.X), nameof(X) },
+            { nameof(SpineObjectModel.Y), nameof(Y) },
 
             // Skins 变化在 SkinViewModel 中监听
             // Slots 变化在 SlotAttachmentViewModel 中监听
             // AnimationTracks 变化在 AnimationTrackViewModel 中监听
 
-            else if (e.PropertyName == nameof(SpineObjectModel.DebugTexture)) OnPropertyChanged(nameof(DebugTexture));
-            else if (e.PropertyName == nameof(SpineObjectModel.DebugBounds)) OnPropertyChanged(nameof(DebugBounds));
-            else if (e.PropertyName == nameof(SpineObjectModel.DebugBones)) OnPropertyChanged(nameof(DebugBones));
-            else if (e.PropertyName == nameof(SpineObjectModel.DebugRegions)) OnPropertyChanged(nameof(DebugRegions));
-            else if (e.PropertyName == nameof(SpineObjectModel.DebugMeshHulls)) OnPropertyChanged(nameof(DebugMeshHulls));
-            else if (e.PropertyName == nameof(SpineObjectModel.DebugMeshes)) OnPropertyChanged(nameof(DebugMeshes));
-            else if (e.PropertyName == nameof(SpineObjectModel.DebugBoundingBoxes)) OnPropertyChanged(nameof(DebugBoundingBoxes));
-            else if (e.PropertyName == nameof(SpineObjectModel.DebugPaths)) OnPropertyChanged(nameof(DebugPaths));
-            else if (e.PropertyName == nameof(SpineObjectModel.DebugPoints)) OnPropertyChanged(nameof(DebugPoints));
-            else if (e.PropertyName == nameof(SpineObjectModel.DebugClippings)) OnPropertyChanged(nameof(DebugClippings));
+            { nameof(SpineObjectModel.DebugTexture), nameof(DebugTexture) },
+            { nameof(SpineObjectModel.DebugBounds), nameof(DebugBounds) },
+            { nameof(SpineObjectModel.DebugBones), nameof(DebugBones) },
+            { nameof(SpineObjectModel.DebugRegions), nameof(DebugRegions) },
+            { nameof(SpineObjectModel.DebugMeshHulls), nameof(DebugMeshHulls) },
+            { nameof(SpineObjectModel.DebugMeshes), nameof(DebugMeshes) },
+            { nameof(SpineObjectModel.DebugBoundingBoxes), nameof(DebugBoundingBoxes) },
+            { nameof(SpineObjectModel.DebugPaths), nameof(DebugPaths) },
+            { nameof(SpineObjectModel.DebugPoints), nameof(DebugPoints) },
+            { nameof(SpineObjectModel.DebugClippings), nameof(DebugClippings) },
+        };
+
+        /// <summary>
+        /// 监听单个模型属性发生变化, 则更新聚合属性值
+        /// </summary>
+        private void SingleModel_PropertyChanged(object? sender, PropertyChangedEventArgs e)
+        {
+            if (_singleModelPropertyMap.TryGetValue(e.PropertyName, out var targetProperty))
+            {
+                OnPropertyChanged(targetProperty);
+            }
         }
 
         /// <summary>
diff --git a/SpineViewer/Views/MainWindow.xaml b/SpineViewer/Views/MainWindow.xaml
index 47c4e8c..0c5d294 100644
--- a/SpineViewer/Views/MainWindow.xaml
+++ b/SpineViewer/Views/MainWindow.xaml
@@ -310,6 +310,7 @@
                                                     <RowDefinition Height="Auto"/>
                                                     <RowDefinition Height="Auto"/>
                                                     <RowDefinition Height="Auto"/>
+                                                    <RowDefinition Height="Auto"/>
                                                 </Grid.RowDefinitions>
 
                                                 <!-- 显示 -->
@@ -323,6 +324,10 @@
                                                 <!-- 物理 -->
                                                 <Label Grid.Row="2" Grid.Column="0" Content="{DynamicResource Str_Physics}"/>
                                                 <ComboBox Grid.Row="2" Grid.Column="1" SelectedValue="{Binding Physics}" ItemsSource="{Binding PhysicsOptions}"/>
+
+                                                <!-- 时间因子 -->
+                                                <Label Grid.Row="3" Grid.Column="0" Content="{DynamicResource Str_TimeScale}" ToolTip="{DynamicResource Str_TimeScaleTootltip}"/>
+                                                <TextBox Grid.Row="3" Grid.Column="1" Text="{Binding TimeScale}" ToolTip="{DynamicResource Str_TimeScaleTootltip}"/>
                                             </Grid>
                                         </TabItem>