diff --git a/App.xaml.cs b/App.xaml.cs
index 0770562..3b8bb8f 100644
--- a/App.xaml.cs
+++ b/App.xaml.cs
@@ -53,6 +53,7 @@ namespace DrillTools
             string extension = Path.GetExtension(filePath).ToLowerInvariant();
             bool canScaleDrillTape = extension == ".dr2" || extension == ".dpin";
             bool isRouFile = extension == ".rou" || extension == ".rou1" || extension == ".rou2" || extension == ".roux";
+            bool isDrlFile = extension == ".drl";
             double minDrill = viewModel.MinDrillDiameter;
             double minSlot = viewModel.MinSlotDiameter;
             double minEA = viewModel.MinEADiameter;
@@ -85,7 +86,8 @@ namespace DrillTools
                 canClearParameters,
                 canGeneratePpDrillTape,
                 canScaleDrillTape,
-                canReplaceRouParameters: isRouFile);
+                canReplaceRouParameters: isRouFile,
+                canReplaceDrlParameters: isDrlFile);
             selectionWindow.ShowDialog();
 
             switch (selectionWindow.SelectedAction)
@@ -114,6 +116,10 @@ namespace DrillTools
                     PerformRouParameterReplace(filePath);
                     Shutdown();
                     break;
+                case StartupAction.ReplaceDrlParameters:
+                    PerformDrlParameterReplace(filePath);
+                    Shutdown();
+                    break;
                 default:
                     Shutdown();
                     break;
@@ -363,6 +369,60 @@ namespace DrillTools
             }
         }
 
+        private static void PerformDrlParameterReplace(string filePath)
+        {
+            try
+            {
+#if DEBUG
+                string paramDir = @"C:\Users\14244\source\repos\Aoh\DrillTools\DRL-canshu";
+#else
+                string paramDir = @"\\ah-file-2\workdata\Drill\DRILLING\etc";
+#endif
+                if (!Directory.Exists(paramDir))
+                {
+                    System.Windows.MessageBox.Show(
+                        $"参数文件目录不存在：\n{paramDir}",
+                        "错误",
+                        MessageBoxButton.OK,
+                        MessageBoxImage.Error);
+                    return;
+                }
+
+                var selectionWindow = new DrlParameterSelectionWindow(paramDir);
+                selectionWindow.ShowDialog();
+
+                if (selectionWindow.SelectedFilePath == null)
+                    return;
+
+                DrlParameterReplacer.ReplaceParameters(filePath, selectionWindow.SelectedFilePath, out var unmatchedDiameters);
+
+                string message = $"参数替换完成：\n{filePath}\n原文件已备份为：\n{Path.GetFileName(filePath)}.bak";
+
+                if (unmatchedDiameters.Count > 0)
+                {
+                    var diaStrings = unmatchedDiameters.Select(d => d.ToString("F3", CultureInfo.InvariantCulture)).ToList();
+                    message += $"\n\n⚠ 以下直径未在参数文件中找到匹配，已保留原行：\n{string.Join(", ", diaStrings)}";
+                }
+
+                System.Windows.MessageBox.Show(
+                    message,
+                    "参数替换完成",
+                    MessageBoxButton.OK,
+                    MessageBoxImage.Information);
+            }
+            catch (OperationCanceledException)
+            {
+            }
+            catch (Exception ex)
+            {
+                System.Windows.MessageBox.Show(
+                    $"参数替换失败：\n{ex.Message}",
+                    "错误",
+                    MessageBoxButton.OK,
+                    MessageBoxImage.Error);
+            }
+        }
+
         /// <summary>
         /// 从 MainWindowViewModel.Tools 独立遍历计算叠板用最小刀径。
         /// 分类逻辑与 UpdateMinDiameterInfo 一致（按尾号使用标准），不排除 0.749mm；
diff --git a/DrlParameterReplacer.cs b/DrlParameterReplacer.cs
new file mode 100644
index 0000000..9b7394e
--- /dev/null
+++ b/DrlParameterReplacer.cs
@@ -0,0 +1,248 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Text;
+using System.Text.RegularExpressions;
+
+namespace DrillTools
+{
+    /// <summary>
+    /// DRL 钻带参数替换：将 A01-A14 参数文件中的 H/Z/S/F/U 参数替换到 .drl 文件的刀径定义行。
+    /// 与 ROU 不同，DRL 刀径行原本已有参数，此处为整体替换而非追加。
+    /// </summary>
+    internal static class DrlParameterReplacer
+    {
+        private const int Gb2312CodePage = 936;
+        private const double DiameterTolerance = 0.001;
+
+        /// <summary>
+        /// 匹配参数文件行：T00C<直径>H<参数...>
+        /// 例：T00C0.749H02500Z+0.000S105.00F105.0U1000.0
+        /// </summary>
+        private static readonly Regex ParamLinePattern = new(
+            @"^T00C(?<diameter>\d+(?:\.\d+)?)(?<params>H.+)$",
+            RegexOptions.Compiled | RegexOptions.IgnoreCase);
+
+        /// <summary>
+        /// 匹配 .drl 刀径定义行：T<刀号>C<直径> + 参数段
+        /// 例：T01C0.799H05000Z+0.000S060.00F105.0U0700.0
+        ///   → prefix="T01C0.799", params="H05000Z+0.000S060.00F105.0U0700.0"
+        /// </summary>
+        private static readonly Regex ToolLinePattern = new(
+            @"^\s*(?<prefix>T\d+C\d+(?:\.\d+)?)(?<params>H.+)$",
+            RegexOptions.Compiled | RegexOptions.IgnoreCase);
+
+        /// <summary>
+        /// 匹配 .drl 刀径行直径部分，用于提取直径数值
+        /// </summary>
+        private static readonly Regex ToolLineDiameterPattern = new(
+            @"^T\d+C(?<diameter>\d+(?:\.\d+)?)",
+            RegexOptions.Compiled | RegexOptions.IgnoreCase);
+
+        /// <summary>
+        /// 匹配参数文件第一行（描述注释行）：;<描述>
+        /// </summary>
+        private static readonly Regex DescriptionLinePattern = new(
+            @"^;(.+)$",
+            RegexOptions.Compiled);
+
+        /// <summary>
+        /// 执行参数替换。
+        /// </summary>
+        /// <param name="drlFilePath">.drl 文件完整路径</param>
+        /// <param name="paramFilePath">A01-A14 参数文件完整路径</param>
+        /// <param name="unmatchedDiameters">未在参数文件中找到的直径列表</param>
+        public static void ReplaceParameters(string drlFilePath, string paramFilePath, out List<double> unmatchedDiameters)
+        {
+            // 1. 读取参数文件，提取第一行描述和直径→参数字符串映射
+            string paramContent = CommandTypeFileReader.ReadAllText(paramFilePath);
+            var paramLines = DrillTapeLineParser.SplitLines(paramContent);
+
+            string paramDescription = ExtractDescription(paramLines);
+            if (string.IsNullOrEmpty(paramDescription))
+                throw new InvalidOperationException("参数文件第一行未找到有效的描述信息（格式：;<描述>）");
+
+            var paramDict = LoadParameterDictionary(paramLines);
+
+            if (paramDict.Count == 0)
+                throw new InvalidOperationException("参数文件中未找到有效的参数行（格式：T00C<直径>H...）");
+
+            // 2. 读取 .drl 文件
+            string drlContent = CommandTypeFileReader.ReadAllText(drlFilePath);
+
+            // 3. 执行替换（同时收集未匹配直径）
+            var unmatchedSet = new HashSet<double>();
+            string replacedContent = ReplaceParametersInContent(drlContent, paramDict, paramDescription, unmatchedSet);
+
+            // 4. 备份原文件
+            string backupFilePath = drlFilePath + ".bak";
+            File.Copy(drlFilePath, backupFilePath, true);
+
+            // 5. 写回文件
+            using var writer = new StreamWriter(drlFilePath, false, Encoding.GetEncoding(Gb2312CodePage));
+            writer.Write(replacedContent);
+
+            unmatchedDiameters = new List<double>(unmatchedSet);
+        }
+
+        /// <summary>
+        /// 从参数文件行中提取第一行描述（去掉前导分号）。
+        /// </summary>
+        private static string ExtractDescription(IReadOnlyList<DrillTapeLine> paramLines)
+        {
+            foreach (var line in paramLines)
+            {
+                string trimmed = line.Text.Trim();
+                var match = DescriptionLinePattern.Match(trimmed);
+                if (match.Success)
+                    return match.Groups[1].Value.Trim();
+            }
+
+            return string.Empty;
+        }
+
+        /// <summary>
+        /// 从参数文件加载直径→参数字符串（从 H 开始到行尾）的映射。
+        /// </summary>
+        private static Dictionary<double, string> LoadParameterDictionary(IReadOnlyList<DrillTapeLine> paramLines)
+        {
+            var dict = new Dictionary<double, string>();
+
+            foreach (var line in paramLines)
+            {
+                string trimmed = line.Text.Trim();
+                var match = ParamLinePattern.Match(trimmed);
+                if (!match.Success)
+                    continue;
+
+                if (!double.TryParse(match.Groups["diameter"].Value,
+                        NumberStyles.Float, CultureInfo.InvariantCulture, out double diameter))
+                    continue;
+
+                diameter = Math.Round(diameter, 3);
+
+                string paramString = match.Groups["params"].Value;
+
+                // 同一直径后面覆盖前面
+                dict[diameter] = paramString;
+            }
+
+            return dict;
+        }
+
+        /// <summary>
+        /// 在 .drl 文件内容中执行参数替换：
+        /// 1. 第2行（注释行）替换为参数文件的描述
+        /// 2. M48~% 区域内按直径匹配替换刀径行的参数段
+        /// </summary>
+        private static string ReplaceParametersInContent(
+            string drlContent,
+            Dictionary<double, string> paramDict,
+            string paramDescription,
+            HashSet<double> unmatchedDiameters)
+        {
+            var lines = DrillTapeLineParser.SplitLines(drlContent);
+
+            // 找到头部边界
+            int headerStart = -1;  // M48 所在行
+            int headerEnd = -1;    // % 所在行
+
+            for (int i = 0; i < lines.Count; i++)
+            {
+                string trimmed = lines[i].Text.Trim();
+                if (headerStart < 0 && trimmed == "M48")
+                    headerStart = i;
+                else if (headerStart >= 0 && trimmed == "%")
+                {
+                    headerEnd = i;
+                    break;
+                }
+            }
+
+            if (headerStart < 0 || headerEnd < 0)
+                throw new InvalidOperationException("DRL 文件格式异常：未找到 M48 或 % 头部标记");
+
+            var builder = new StringBuilder(drlContent.Length + 1024);
+
+            for (int i = 0; i < lines.Count; i++)
+            {
+                if (i == headerStart + 1)
+                {
+                    // 第2行：替换为参数文件的描述注释行
+                    string trailing = GetTrailingWhitespace(lines[i]);
+                    builder.Append(';');
+                    builder.Append(paramDescription);
+                    builder.Append(trailing);
+                    builder.Append(lines[i].LineEnding);
+                }
+                else if (i > headerStart && i < headerEnd)
+                {
+                    // 头部区域（M48 和 % 之间，排除已处理的第2行）
+                    string trimmed = lines[i].Text.Trim();
+                    var match = ToolLinePattern.Match(trimmed);
+
+                    if (match.Success)
+                    {
+                        string prefix = match.Groups["prefix"].Value;
+                        string trailing = GetTrailingWhitespace(lines[i]);
+
+                        // 从 prefix 中提取直径
+                        var diaMatch = ToolLineDiameterPattern.Match(prefix);
+                        if (diaMatch.Success &&
+                            double.TryParse(diaMatch.Groups["diameter"].Value,
+                                NumberStyles.Float, CultureInfo.InvariantCulture, out double diameter))
+                        {
+                            double roundedDiameter = Math.Round(diameter, 3);
+
+                            if (paramDict.TryGetValue(roundedDiameter, out string? newParams))
+                            {
+                                builder.Append(prefix);
+                                builder.Append(newParams);
+                                builder.Append(trailing);
+                                builder.Append(lines[i].LineEnding);
+                            }
+                            else
+                            {
+                                // 未匹配：保留原行
+                                unmatchedDiameters.Add(roundedDiameter);
+                                builder.Append(lines[i].Text);
+                                builder.Append(lines[i].LineEnding);
+                            }
+                        }
+                        else
+                        {
+                            // 无法提取直径，保留原行
+                            builder.Append(lines[i].Text);
+                            builder.Append(lines[i].LineEnding);
+                        }
+                    }
+                    else
+                    {
+                        // 非刀径行（如其他注释等）原样保留
+                        builder.Append(lines[i].Text);
+                        builder.Append(lines[i].LineEnding);
+                    }
+                }
+                else
+                {
+                    // % 之后或其他区域原样保留
+                    builder.Append(lines[i].Text);
+                    builder.Append(lines[i].LineEnding);
+                }
+            }
+
+            return builder.ToString();
+        }
+
+        /// <summary>
+        /// 获取行尾空白字符。
+        /// </summary>
+        private static string GetTrailingWhitespace(DrillTapeLine line)
+        {
+            string original = line.Text;
+            int trimmedLength = original.TrimEnd().Length;
+            return trimmedLength < original.Length ? original[trimmedLength..] : string.Empty;
+        }
+    }
+}
diff --git a/DrlParameterSelectionWindow.xaml b/DrlParameterSelectionWindow.xaml
new file mode 100644
index 0000000..f8f31fa
--- /dev/null
+++ b/DrlParameterSelectionWindow.xaml
@@ -0,0 +1,32 @@
+<Window x:Class="DrillTools.DrlParameterSelectionWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="选择钻带参数"
+        Width="500"
+        SizeToContent="Height"
+        ResizeMode="NoResize"
+        Topmost="True"
+        WindowStartupLocation="CenterScreen">
+    <Grid Margin="15">
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto" />
+            <RowDefinition Height="*" />
+            <RowDefinition Height="Auto" />
+        </Grid.RowDefinitions>
+
+        <TextBlock Grid.Row="0" Text="请选择要使用的钻带参数文件：" Margin="0,0,0,10" />
+
+        <ListBox Grid.Row="1"
+                 Name="FileListBox"
+                 Height="280"
+                 Margin="0,0,0,15"
+                 DisplayMemberPath="Description" />
+
+        <StackPanel Grid.Row="2" HorizontalAlignment="Center" Orientation="Horizontal">
+            <Button Name="OkButton" Width="80" Height="28" Content="确定" Margin="0,0,15,0"
+                    Click="OkButton_Click" IsDefault="True" />
+            <Button Name="CancelButton" Width="80" Height="28" Content="取消"
+                    Click="CancelButton_Click" IsCancel="True" />
+        </StackPanel>
+    </Grid>
+</Window>
diff --git a/DrlParameterSelectionWindow.xaml.cs b/DrlParameterSelectionWindow.xaml.cs
new file mode 100644
index 0000000..03e9ac4
--- /dev/null
+++ b/DrlParameterSelectionWindow.xaml.cs
@@ -0,0 +1,105 @@
+using System.Collections.Generic;
+using System.IO;
+using System.Windows;
+
+namespace DrillTools
+{
+    /// <summary>
+    /// 钻带参数文件选择窗口，列出 A01-A14 文件并以第一行描述文本展示供用户选择。
+    /// </summary>
+    public partial class DrlParameterSelectionWindow : Window
+    {
+        /// <summary>
+        /// 用户选中的文件完整路径；若取消则为 null。
+        /// </summary>
+        public string? SelectedFilePath { get; private set; }
+
+        public DrlParameterSelectionWindow(string paramDirectory)
+        {
+            InitializeComponent();
+
+            var items = new List<ParamFileItem>();
+            for (int i = 1; i <= 14; i++)
+            {
+                string fileName = $"A{i:D2}";
+                string filePath = Path.Combine(paramDirectory, fileName);
+
+                if (!File.Exists(filePath))
+                    continue;
+
+                string description = ReadFirstLineDescription(filePath);
+                items.Add(new ParamFileItem
+                {
+                    FileName = fileName,
+                    FilePath = filePath,
+                    Description = $"{fileName}  —  {description}"
+                });
+            }
+
+            FileListBox.ItemsSource = items;
+            OkButton.IsEnabled = false;
+
+            FileListBox.SelectionChanged += (_, _) =>
+            {
+                OkButton.IsEnabled = FileListBox.SelectedItem != null;
+            };
+
+            FileListBox.MouseDoubleClick += (_, _) =>
+            {
+                if (FileListBox.SelectedItem is ParamFileItem item)
+                {
+                    SelectedFilePath = item.FilePath;
+                    DialogResult = true;
+                    Close();
+                }
+            };
+        }
+
+        /// <summary>
+        /// 读取参数文件的第一行描述文本（去掉前导分号）。
+        /// </summary>
+        private static string ReadFirstLineDescription(string filePath)
+        {
+            try
+            {
+                string content = CommandTypeFileReader.ReadAllText(filePath);
+                var lines = DrillTapeLineParser.SplitLines(content);
+                if (lines.Count > 0)
+                {
+                    string firstLine = lines[0].Text.Trim();
+                    if (firstLine.StartsWith(";"))
+                        return firstLine[1..].Trim();
+                    return firstLine;
+                }
+                return "(无法读取)";
+            }
+            catch
+            {
+                return "(无法读取)";
+            }
+        }
+
+        private void OkButton_Click(object sender, RoutedEventArgs e)
+        {
+            if (FileListBox.SelectedItem is ParamFileItem item)
+            {
+                SelectedFilePath = item.FilePath;
+                DialogResult = true;
+                Close();
+            }
+        }
+
+        private void CancelButton_Click(object sender, RoutedEventArgs e)
+        {
+            DialogResult = false;
+            Close();
+        }
+
+        private class ParamFileItem
+        {
+            public string FileName { get; init; } = string.Empty;
+            public string FilePath { get; init; } = string.Empty;
+            public string Description { get; init; } = string.Empty;
+        }
+    }
+}
diff --git a/StartupSelectionWindow.xaml b/StartupSelectionWindow.xaml
index 18e646e..29ed165 100644
--- a/StartupSelectionWindow.xaml
+++ b/StartupSelectionWindow.xaml
@@ -138,6 +138,7 @@
             <Button Width="120" Height="30" Content="导出孔数" Margin="0,0,15,0" Click="ExportHoleCount_Click"/>
             <Button Name="ClearParametersButton" Width="120" Height="30" Content="清空参数" Margin="0,0,15,0" Click="ClearParameters_Click"/>
             <Button Name="ReplaceRouParametersButton" Width="120" Height="30" Content="更改参数" Margin="0,0,15,0" Click="ReplaceRouParameters_Click" Visibility="Collapsed"/>
+            <Button Name="ReplaceDrlParametersButton" Width="120" Height="30" Content="更改参数" Margin="0,0,15,0" Click="ReplaceDrlParameters_Click" Visibility="Collapsed"/>
             <Button Name="GeneratePpDrillTapeButton" Width="120" Height="30" Content="生成PP钻带" Margin="0,0,15,0" Click="GeneratePpDrillTape_Click"/>
             <Button Name="ScaleDrillTapeButton" Width="120" Height="30" Content="二钻涨缩" Click="ScaleDrillTape_Click"/>
         </StackPanel>
diff --git a/StartupSelectionWindow.xaml.cs b/StartupSelectionWindow.xaml.cs
index e94c585..b1b31c2 100644
--- a/StartupSelectionWindow.xaml.cs
+++ b/StartupSelectionWindow.xaml.cs
@@ -10,7 +10,8 @@ namespace DrillTools
         ClearParameters,
         GeneratePpDrillTape,
         ScaleDrillTape,
-        ReplaceRouParameters
+        ReplaceRouParameters,
+        ReplaceDrlParameters
     }
 
     public partial class StartupSelectionWindow : Window
@@ -19,7 +20,8 @@ namespace DrillTools
 
         public StartupSelectionWindow(StartupSelectionViewModel viewModel,
             bool canClearParameters = false, bool canGeneratePpDrillTape = false,
-            bool canScaleDrillTape = false, bool canReplaceRouParameters = false)
+            bool canScaleDrillTape = false, bool canReplaceRouParameters = false,
+            bool canReplaceDrlParameters = false)
         {
             InitializeComponent();
             DataContext = viewModel;
@@ -27,6 +29,7 @@ namespace DrillTools
             GeneratePpDrillTapeButton.Visibility = canGeneratePpDrillTape ? Visibility.Visible : Visibility.Collapsed;
             ScaleDrillTapeButton.Visibility = canScaleDrillTape ? Visibility.Visible : Visibility.Collapsed;
             ReplaceRouParametersButton.Visibility = canReplaceRouParameters ? Visibility.Visible : Visibility.Collapsed;
+            ReplaceDrlParametersButton.Visibility = canReplaceDrlParameters ? Visibility.Visible : Visibility.Collapsed;
         }
 
         private void AdjustToolOrder_Click(object sender, RoutedEventArgs e)
@@ -64,5 +67,11 @@ namespace DrillTools
             SelectedAction = StartupAction.ReplaceRouParameters;
             Close();
         }
+
+        private void ReplaceDrlParameters_Click(object sender, RoutedEventArgs e)
+        {
+            SelectedAction = StartupAction.ReplaceDrlParameters;
+            Close();
+        }
     }
 }