diff --git a/main/res/layout/activity_main.xml b/main/res/layout/activity_main.xml
new file mode 100644
index 0000000..a502544
--- /dev/null
+++ b/main/res/layout/activity_main.xml
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@drawable/r8"
+    tools:context=".MainActivity">
+
+    <TextView
+        android:id="@+id/choose_text"
+        android:layout_width="250dp"
+        android:layout_height="100dp"
+        android:layout_marginLeft="100dp"
+        android:layout_marginTop="150dp"
+        android:text="选择模式"
+        android:textColor="#021140"
+        android:textSize="60dp" />
+
+
+    <Button
+        android:id="@+id/button_toFree"
+        android:layout_width="200dp"
+        android:layout_height="50dp"
+        android:layout_marginLeft="100dp"
+        android:layout_marginTop="300dp"
+        android:background="@drawable/boder"
+        android:text="1.自由模式"
+        android:textColor="#021140"
+        android:textSize="30dp" />
+    <Button
+        android:id="@+id/button_toChooseLevel"
+        android:layout_width="200dp"
+        android:layout_height="50dp"
+        android:layout_marginTop="370dp"
+        android:background="@drawable/boder"
+        android:layout_marginLeft="100dp"
+        android:text="2.闯关模式"
+        android:textSize="30dp"
+        android:textColor="#021140" />
+    <Button
+        android:id="@+id/button_toChange"
+        android:layout_width="200dp"
+        android:layout_height="50dp"
+        android:layout_marginTop="440dp"
+        android:background="@drawable/boder"
+        android:layout_marginLeft="100dp"
+        android:text="3.乐谱转换"
+        android:textSize="30dp"
+        android:textColor="#021140" />
+
+</RelativeLayout>
\ No newline at end of file