diff --git a/Plain Craft Launcher 2/Modules/Minecraft/ModModpack.cs b/Plain Craft Launcher 2/Modules/Minecraft/ModModpack.cs
index 9c753cb10..55349ff44 100644
--- a/Plain Craft Launcher 2/Modules/Minecraft/ModModpack.cs	
+++ b/Plain Craft Launcher 2/Modules/Minecraft/ModModpack.cs	
@@ -70,6 +70,7 @@ public static LoaderCombo<string> ModpackInstall(string file, string instanceNam
 
             // 获取整合包种类与关键 Json
             var packType = -1;
+            ZipArchiveEntry nestedModpackEntry = null;
             do
             {
                 try
@@ -117,12 +118,18 @@ public static LoaderCombo<string> ModpackInstall(string file, string instanceNam
                         break;
                     } // HMCL 整合包
 
-                    if (archive.GetEntry("modpack.zip") is not null || archive.GetEntry("modpack.mrpack") is not null)
+                    if (archive.GetEntry("modpack.zip") is not null)
                     {
                         packType = 9;
                         break;
                     } // 带启动器的压缩包
 
+                    nestedModpackEntry = archive.GetEntry("modpack.mrpack");
+                    if (nestedModpackEntry is not null)
+                    {
+                        break;
+                    }
+
                     // 从一级目录判断整合包类型
                     var exitTry = false;
                     foreach (var Entry in archive.Entries)
@@ -178,12 +185,19 @@ public static LoaderCombo<string> ModpackInstall(string file, string instanceNam
                             break;
                         } // HMCL 整合包
 
-                        if (fullNames[1] == "modpack.zip" || fullNames[1] == "modpack.mrpack")
+                        if (fullNames[1] == "modpack.zip")
                         {
                             packType = 9;
                             exitTry = true;
                             break;
                         } // 带启动器的压缩包
+
+                        if (fullNames[1] == "modpack.mrpack")
+                        {
+                            nestedModpackEntry = Entry;
+                            exitTry = true;
+                            break;
+                        }
                     }
 
                     if (exitTry) break;
@@ -199,6 +213,15 @@ public static LoaderCombo<string> ModpackInstall(string file, string instanceNam
                 }
             } while (false);
 
+            if (nestedModpackEntry is not null)
+            {
+                var tempFile = Path.Combine(ModMain.RequestTaskTempFolder(), "modpack.mrpack");
+                nestedModpackEntry.ExtractToFile(tempFile, overwrite: true);
+                archive.Dispose();
+                archive = null;
+                return ModpackInstall(tempFile, instanceName, logo, resourceId, isOnlineInstall);
+            }
+
             // 执行对应的安装方法
             switch (packType)
             {