diff --git a/src/BootstrapBlazor/Components/Select/Select.razor.cs b/src/BootstrapBlazor/Components/Select/Select.razor.cs
index d9b83a9041b0deafc8da31a1323660efa339c66a..008e87e564d413fbc281366dba01520d314f5a0f 100644
--- a/src/BootstrapBlazor/Components/Select/Select.razor.cs
+++ b/src/BootstrapBlazor/Components/Select/Select.razor.cs
@@ -33,7 +33,7 @@ public partial class Select<TValue> : ISelect
     /// <summary>
     /// 获得 样式集合
     /// </summary>
-    private string? InputClassName => CssBuilder.Default("form-select")
+    private string? InputClassName => CssBuilder.Default("form-select form-control")
         .AddClass($"border-{Color.ToDescriptionString()}", Color != Color.None && !IsDisabled && !IsValid.HasValue)
         .AddClass($"border-success", IsValid.HasValue && IsValid.Value)
         .AddClass($"border-danger", IsValid.HasValue && !IsValid.Value)
diff --git a/src/BootstrapBlazor/Components/Select/SelectTree.razor.cs b/src/BootstrapBlazor/Components/Select/SelectTree.razor.cs
index df41cab1f6a143d1d777af00f8fe221ddd925d5a..d2fcb872bb38140d159edaf4d70a5fd1455a78ec 100644
--- a/src/BootstrapBlazor/Components/Select/SelectTree.razor.cs
+++ b/src/BootstrapBlazor/Components/Select/SelectTree.razor.cs
@@ -22,7 +22,7 @@ public partial class SelectTree<TValue>
     /// <summary>
     /// 获得 样式集合
     /// </summary>
-    private string? InputClassName => CssBuilder.Default("form-select")
+    private string? InputClassName => CssBuilder.Default("form-select form-control")
         .AddClass($"border-{Color.ToDescriptionString()}", Color != Color.None && !IsDisabled && !IsValid.HasValue)
         .AddClass($"border-success", IsValid.HasValue && IsValid.Value)
         .AddClass($"border-danger", IsValid.HasValue && !IsValid.Value)