diff --git a/src-tauri/src/app_error.rs b/src-tauri/src/app_error.rs
index fed4fb8..8c5eeea 100644
--- a/src-tauri/src/app_error.rs
+++ b/src-tauri/src/app_error.rs
@@ -1,6 +1,9 @@
 use thiserror;
 
-use crate::pe_parse::error::PEParseError;
+use crate::pe_parse::error::{
+    MutablePEError,
+    PEParseError,
+};
 
 #[derive(Debug, thiserror::Error)]
 pub enum AppError {
@@ -18,6 +21,9 @@ pub enum AppError {
     #[error(transparent)]
     PeParseError(#[from] PEParseError),
 
+    #[error(transparent)]
+    MutablePeError(#[from] MutablePEError),
+
     /// 初始化打开文件失败
     #[error("初始化打开文件失败!: {0}")]
     InitOpenFileFailed(String),
diff --git a/src-tauri/src/app_state.rs b/src-tauri/src/app_state.rs
index 5674812..acb4737 100644
--- a/src-tauri/src/app_state.rs
+++ b/src-tauri/src/app_state.rs
@@ -1,7 +1,8 @@
 use std::io::Seek;
-use std::option;
+use std::mem::offset_of;
 
 use crate::app_error::AppError;
+use crate::pe_parse::header::ImageOptionalHeader;
 use crate::{pe_parse::pe::ReadOnlyPE, services::file};
 use memmap2::{Mmap, MmapOptions};
 
@@ -68,18 +69,12 @@ impl AppState {
         section_size: usize,
         section_characteristics: u32,
     ) -> Result<(), AppError> {
-        // 1. section_name不能超过8个字符
         if section_name.len() > 8 {
+            // section_name不能超过8个字符
             return Err(AppError::SectionNameTooLong);
         }
-        // as_bytes 没有补0
         let mut section_name_bytes = [0u8; 8];
-        // 循环拷贝section_name的数据
-        for i in 0..section_name.len() {
-            if i < section_name.len() {
-                section_name_bytes[i] = section_name.as_bytes()[i];
-            }
-        }
+        section_name_bytes[..section_name.len()].copy_from_slice(section_name.as_bytes());
 
         // 判断是否可以添加节
         // if(size_of_headers - 最后一个节表的偏移 - 40) >= 40，则可以添加节表。
@@ -87,36 +82,22 @@ impl AppState {
         let mmap = self.get_mmap_ref()?;
         let origin_file_len = mmap.len();
         let optional_header = mmap.get_optional_header()?;
-        let file_header_offset = mmap.get_file_header_offset()?;
         let optional_header_offset = mmap.get_optional_header_offset()?;
         let file_header = mmap.get_file_header()?;
-        let size_of_headers = match optional_header {
-            crate::pe_parse::header::ImageOptionalHeader::OptionalHeader32(
-                image_optional_header32,
-            ) => image_optional_header32.size_of_headers,
-            crate::pe_parse::header::ImageOptionalHeader::OptionalHeader64(
-                image_optional_header64,
-            ) => image_optional_header64.size_of_headers,
+        let file_header_offset = mmap.get_file_header_offset()?;
+        let (size_of_headers, section_alignment) = match optional_header {
+            ImageOptionalHeader::OptionalHeader32(image_optional_header32) => {
+                (image_optional_header32.size_of_headers, image_optional_header32.section_alignment)
+            }
+            ImageOptionalHeader::OptionalHeader64(image_optional_header64) => {
+                (image_optional_header64.size_of_headers, image_optional_header64.section_alignment)
+            }
         };
         let section_table_offset = mmap.get_section_headers_offset()?;
         // 获取节表的数量
         let number_of_sections = file_header.number_of_sections;
-        // 1. 获取偏移
-        let section_alignment = match optional_header {
-            crate::pe_parse::header::ImageOptionalHeader::OptionalHeader32(
-                image_optional_header32,
-            ) => image_optional_header32.section_alignment,
-            crate::pe_parse::header::ImageOptionalHeader::OptionalHeader64(
-                image_optional_header64,
-            ) => image_optional_header64.section_alignment,
-        };
-
-        // 3. 判断是否可以添加节表
         let section_table_size = 40 * number_of_sections as usize;
-
         if size_of_headers - section_table_offset as u32 - (section_table_size as u32) < 40 {
-            // 需要看一下是否可以拓展文件大小
-
             // 2. 计算size_of_headers对齐之后的大小 例如:0x400 -> 0x1000
             let aligned_size_of_headers =
                 (size_of_headers + section_alignment - 1) & !(section_alignment - 1);
@@ -180,12 +161,17 @@ impl AppState {
             rw_mmap[optional_header_offset + 0x38..optional_header_offset + 0x3C]
                 .copy_from_slice(&(origin_size_of_image + add_image_size as u32).to_le_bytes());
 
+            // 修改SizeOfHeaders,修改后的长度是：size_of_headers + expand_size例如：0x400 -> 0x1000
+            let new_size_of_headers = size_of_headers + expand_size;
+            rw_mmap[optional_header_offset + 0x3C..optional_header_offset + 0x40]
+                .copy_from_slice(&new_size_of_headers.to_le_bytes());
+
             rw_mmap.flush()?;
             // 3. 重新映射文件
             self.mmap = Some(file::mmap_file(self.file_path.as_ref().unwrap())?);
         }
-        // 4. 添加节表
-        // 新的节区文件偏移是文件末尾
+        
+        // 可以添加节表
         let new_section_offset = self.get_mmap_ref()?.len();
         let new_section_header_offset = section_table_offset + section_table_size;
         {
@@ -207,7 +193,8 @@ impl AppState {
             .copy_from_slice(&section_name_bytes);
 
         // virtual_size需要对齐
-        let mut virtual_size = ((section_size as u32) + section_alignment - 1) & !(section_alignment - 1);
+        let mut virtual_size =
+            ((section_size as u32) + section_alignment - 1) & !(section_alignment - 1);
         if virtual_size == 0 {
             virtual_size = section_alignment;
         }
@@ -215,7 +202,6 @@ impl AppState {
         rw_mmap[new_section_header_offset + 8..new_section_header_offset + 12]
             .copy_from_slice(&(virtual_size as u32).to_le_bytes());
 
-
         // 写入节的VA
         let last_section_header_offset =
             section_table_offset + 40 * (number_of_sections - 1) as usize;
@@ -229,8 +215,8 @@ impl AppState {
                 .try_into()
                 .unwrap(),
         );
-        let last_section_alignment_size = (last_sction_size + section_alignment - 1)
-            & !(section_alignment - 1);
+        let last_section_alignment_size =
+            (last_sction_size + section_alignment - 1) & !(section_alignment - 1);
 
         // 对齐后的VA, 对齐方式(last_section_va ) 和section_alignment进行对齐
         let aligned_va = ((last_section_va + last_section_alignment_size) + section_alignment - 1)
@@ -255,11 +241,6 @@ impl AppState {
         rw_mmap[file_header_offset + 2..file_header_offset + 4]
             .copy_from_slice(&(number_of_sections + 1).to_le_bytes());
 
-        // 修改size_of_headers的大小
-        let new_size_of_headers = size_of_headers + 40;
-        rw_mmap[optional_header_offset + 0x3C..optional_header_offset + 0x40]
-            .copy_from_slice(&new_size_of_headers.to_le_bytes());
-
         let origin_size_of_image = unsafe {
             // 在0x38的位置
             u32::from_le_bytes(
diff --git a/src-tauri/src/commands.rs b/src-tauri/src/commands.rs
index 94ea936..c80a719 100644
--- a/src-tauri/src/commands.rs
+++ b/src-tauri/src/commands.rs
@@ -1,10 +1,18 @@
-use std::sync::Mutex;
+use std::{
+    io::{Seek, Write},
+    sync::Mutex,
+};
 
 use crate::{
     app_error::AppError,
     app_state::AppState,
-    pe_parse::pe::ReadOnlyPE,
+    pe_parse::{
+        error::MutablePEError,
+        pe::{MutablePE, ReadOnlyPE},
+    },
+    services::file::mmap_file_rw,
 };
+use memmap2::MmapOptions;
 use serde::Serialize;
 use serde_json::{json, Value};
 use tauri::{AppHandle, Manager, State};
@@ -137,7 +145,9 @@ pub fn command_get_pe_data_nt_header(
 
 // 命令，获取文件头数据
 #[tauri::command(async)]
-pub fn command_get_pe_data_file_header(app_state: State<'_, Mutex<AppState>>) -> Result<Value, AppError> {
+pub fn command_get_pe_data_file_header(
+    app_state: State<'_, Mutex<AppState>>,
+) -> Result<Value, AppError> {
     let app_state = app_state.lock().unwrap();
     let mmap = app_state.get_mmap_ref()?;
     let file_header = mmap.get_file_header()?;
@@ -150,7 +160,9 @@ pub fn command_get_pe_data_file_header(app_state: State<'_, Mutex<AppState>>) ->
 
 // 命令，获取可选头数据
 #[tauri::command(async)]
-pub fn command_get_pe_data_optional_header(app_state: State<'_, Mutex<AppState>>) -> Result<Value, AppError> {
+pub fn command_get_pe_data_optional_header(
+    app_state: State<'_, Mutex<AppState>>,
+) -> Result<Value, AppError> {
     let app_state = app_state.lock().unwrap();
     let mmap = app_state.get_mmap_ref()?;
     let optional_header = mmap.get_optional_header()?;
@@ -165,7 +177,9 @@ pub fn command_get_pe_data_optional_header(app_state: State<'_, Mutex<AppState>>
 
 // 命令，获取节区头数据
 #[tauri::command(async)]
-pub fn command_get_pe_data_section_headers(app_state: State<'_, Mutex<AppState>>) -> Result<Value, AppError> {
+pub fn command_get_pe_data_section_headers(
+    app_state: State<'_, Mutex<AppState>>,
+) -> Result<Value, AppError> {
     let app_state = app_state.lock().unwrap();
     let mmap = app_state.get_mmap_ref()?;
     let section_headers = mmap.get_section_headers()?;
@@ -189,7 +203,6 @@ pub fn command_write_data(
     Ok(())
 }
 
-
 // 命令，添加节
 #[tauri::command]
 pub fn command_add_section(
@@ -201,4 +214,45 @@ pub fn command_add_section(
     let mut app_state = app_state.lock().unwrap();
     app_state.add_section(&section_name, section_size, section_characteristics)?;
     Ok(())
-}
\ No newline at end of file
+}
+
+// 测试一下expand_headers好使不好使
+#[tauri::command]
+pub fn command_expand_headers(
+    app_state: State<'_, Mutex<AppState>>,
+    expand_size: u32,
+) -> Result<(), AppError> {
+    let app_state = app_state.lock().unwrap();
+    // app_state.expand_headers(expand_size)?;
+    let mmap = app_state.get_mmap_ref()?;
+    // 获取文件对齐后的大小
+    let file_alignment = mmap.align_size_with_file_alignment(expand_size)?;
+    // 获取最大可以拓展的大小
+    let max_expand_size = mmap.get_header_max_expand_size()?;
+    if expand_size > max_expand_size {
+        return Err(AppError::MutablePeError(
+            MutablePEError::CannotExpandHeader(expand_size, max_expand_size),
+        ));
+    }
+
+    let file_path = app_state.file_path.as_ref().unwrap();
+    let mut file = std::fs::OpenOptions::new()
+        .read(true)
+        .write(true)
+        .open(file_path)?;
+    // 文件指针移动到文件末尾
+    file.seek(std::io::SeekFrom::End(0))?;
+    // 拓展文件大小
+    file.set_len(file.metadata()?.len() + file_alignment as u64)?;
+    file.seek(std::io::SeekFrom::Start(0))?;
+    file.flush()?;
+    // 映射
+    let mut mut_mmap = unsafe {
+        MmapOptions::new()
+            .map_mut(&file)
+            .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e.to_string()))?
+    };
+    mut_mmap.expand_headers(expand_size)?;
+
+    Ok(())
+}
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 626dba9..f4966e7 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -26,6 +26,7 @@ pub fn run() {
             commands::command_get_pe_data_section_headers,
             commands::command_write_data,
             commands::command_add_section,
+            commands::command_expand_headers,
         ])
         .setup(|app| {
             app.manage(Mutex::new(app_state::AppState::default()));
diff --git a/src-tauri/src/pe_parse/error.rs b/src-tauri/src/pe_parse/error.rs
index 5dfe263..1cf148a 100644
--- a/src-tauri/src/pe_parse/error.rs
+++ b/src-tauri/src/pe_parse/error.rs
@@ -13,3 +13,17 @@ pub enum PEParseError {
     #[error("解析超出了文件范围")]
     OutOfBounds,
 }
+/// PE操作的错误
+#[derive(Error, Debug)]
+pub enum MutablePEError {
+    // 兼容PE解析错误
+    #[error(transparent)]
+    PEParseError(#[from] PEParseError),
+    // 头部映射无法扩容，超出最大可扩容范围
+    #[error("头部映射无法扩容, 需要扩容大小:{0:#X},超过了最大可扩容范围:{1:#X}")]
+    CannotExpandHeader(u32, u32),
+
+    // 文件大小不足，无法扩容
+    #[error("文件大小不足，无法扩容! 需要的大小:{0:#X}, 当前的文件大小:{1:#X}")]
+    CannotExpandFileSize(u32, u32),
+}
diff --git a/src-tauri/src/pe_parse/header.rs b/src-tauri/src/pe_parse/header.rs
index a4a9522..4155e74 100644
--- a/src-tauri/src/pe_parse/header.rs
+++ b/src-tauri/src/pe_parse/header.rs
@@ -42,6 +42,7 @@ pub struct ImageNTHeader64 {
     pub optional_header: ImageOptionalHeader64,
 }
 
+#[repr(C)]
 #[derive(Serialize, Clone, Copy)]
 #[serde(untagged)]
 pub enum ImageNTHeader{
@@ -49,6 +50,24 @@ pub enum ImageNTHeader{
     NTHeader64(ImageNTHeader64),
 }
 
+#[repr(C)]
+#[derive(Serialize)]
+#[serde(untagged)]
+pub enum ImageNTHeaderMut<'a>{
+    NTHeader32(&'a mut ImageNTHeader32),
+    NTHeader64(&'a mut ImageNTHeader64),
+}
+
+impl <'a> ImageNTHeaderMut<'a>{
+    pub fn get_optional_header_mut(&mut self) -> ImageOptionalHeaderMut{
+        match self{
+            ImageNTHeaderMut::NTHeader32(header) => ImageOptionalHeaderMut::OptionalHeader32(&mut header.optional_header),
+            ImageNTHeaderMut::NTHeader64(header) => ImageOptionalHeaderMut::OptionalHeader64(&mut header.optional_header),
+        }
+    }
+}
+
+
 #[repr(C)]
 #[derive(Debug, Clone, Copy, Serialize)]
 pub struct ImageFileHeader {
@@ -298,6 +317,7 @@ pub struct ImageOptionalHeader64 {
     pub loader_flags: u32,
     pub number_of_rva_and_sizes: u32,
 }
+#[repr(C)]
 #[derive(Serialize, Clone, Copy)]
 #[serde(untagged)]
 pub enum ImageOptionalHeader {
@@ -305,6 +325,31 @@ pub enum ImageOptionalHeader {
     OptionalHeader64(ImageOptionalHeader64),
 }
 
+#[repr(C)]
+#[derive(Serialize)]
+#[serde(untagged)]
+pub enum ImageOptionalHeaderMut<'a> {
+    OptionalHeader32(&'a mut ImageOptionalHeader32),
+    OptionalHeader64(&'a mut ImageOptionalHeader64),
+}
+
+impl ImageOptionalHeader {
+    pub fn get_size_of_headers(&self) -> u32 {
+        match self {
+            ImageOptionalHeader::OptionalHeader32(header) => header.size_of_headers,
+            ImageOptionalHeader::OptionalHeader64(header) => header.size_of_headers,
+        }
+    }
+
+    pub fn get_size_of_image(&self) -> u32 {
+        match self {
+            ImageOptionalHeader::OptionalHeader32(header) => header.size_of_image,
+            ImageOptionalHeader::OptionalHeader64(header) => header.size_of_image,
+        }
+    }
+}
+
+
 #[repr(C)]
 #[derive(Debug, Clone, Copy, Serialize)]
 pub struct ImageSectionHeader {
diff --git a/src-tauri/src/pe_parse/pe.rs b/src-tauri/src/pe_parse/pe.rs
index db40d25..5c20224 100644
--- a/src-tauri/src/pe_parse/pe.rs
+++ b/src-tauri/src/pe_parse/pe.rs
@@ -1,7 +1,15 @@
-use super::{error::PEParseError, header::*};
-use std::ops::Deref;
+use memmap2::MmapMut;
 
-pub trait ReadOnlyPE: Deref<Target = [u8]> + Sized {
+use super::{
+    error::{MutablePEError, PEParseError},
+    header::*,
+};
+use std::{
+    mem::{self, offset_of},
+    ops::{Deref, DerefMut, IndexMut},
+};
+
+pub trait ReadOnlyPE: Deref<Target = [u8]> + Sized + AsRef<[u8]> {
     /// Get a reference to a type at a given offset.
     fn get_ref<T>(&self, offset: usize) -> Result<&T, PEParseError> {
         let len = std::mem::size_of::<T>();
@@ -20,22 +28,49 @@ pub trait ReadOnlyPE: Deref<Target = [u8]> + Sized {
         Ok(is_64_bit)
     }
 
+    /// 将size与节对齐值进行对齐，返回对齐后的值
+    /// size: 需要对齐的值
+    fn align_size_with_section_alignment(&self, size: u32) -> Result<u32, PEParseError> {
+        let nt_header = self.get_nt_header()?;
+        let section_alignment = match nt_header {
+            ImageNTHeader::NTHeader32(nt_header) => nt_header.optional_header.section_alignment,
+            ImageNTHeader::NTHeader64(nt_header) => nt_header.optional_header.section_alignment,
+        };
+        let aligned_size = (size + section_alignment - 1) & !(section_alignment - 1);
+        Ok(aligned_size)
+    }
+
+    /// 将size与文件对齐值进行对齐，返回对齐后的值
+    /// size: 需要对齐的值
+    fn align_size_with_file_alignment(&self, size: u32) -> Result<u32, PEParseError> {
+        let nt_header = self.get_nt_header()?;
+        let file_alignment = match nt_header {
+            ImageNTHeader::NTHeader32(nt_header) => nt_header.optional_header.file_alignment,
+            ImageNTHeader::NTHeader64(nt_header) => nt_header.optional_header.file_alignment,
+        };
+        let aligned_size = (size + file_alignment - 1) & !(file_alignment - 1);
+        Ok(aligned_size)
+    }
+
     /// Get the DOS header without verifying its contents.
     fn get_dos_header(&self) -> Result<&ImageDosHeader, PEParseError> {
         let result = self.get_ref::<ImageDosHeader>(0)?;
         Ok(result)
     }
 
+    /// 作为32位的NT头解析
     fn get_nt_header32(&self) -> Result<&ImageNTHeader32, PEParseError> {
         let nt_offset = self.get_nt_headers_offset()?;
         let result = self.get_ref::<ImageNTHeader32>(nt_offset)?;
         Ok(result)
     }
+    /// 作为64位的NT头解析
     fn get_nt_header64(&self) -> Result<&ImageNTHeader64, PEParseError> {
         let nt_offset = self.get_nt_headers_offset()?;
         let result = self.get_ref::<ImageNTHeader64>(nt_offset)?;
         Ok(result)
     }
+    /// 动态的解析NT头 无论是32位还是64位
     fn get_nt_header(&self) -> Result<ImageNTHeader, PEParseError> {
         let is_64_bit = self.is_64_bit()?;
         let result = match is_64_bit {
@@ -79,7 +114,7 @@ pub trait ReadOnlyPE: Deref<Target = [u8]> + Sized {
         let file_header = self.get_file_header()?;
         Ok(file_header.size_of_optional_header as usize)
     }
-
+    /// 作为32位的可选头解析
     fn get_optional_header_32(&self) -> Result<&ImageOptionalHeader32, PEParseError> {
         let file_header_offset = self.get_file_header_offset()?;
         let optional_header_offset = file_header_offset + std::mem::size_of::<ImageFileHeader>();
@@ -87,14 +122,14 @@ pub trait ReadOnlyPE: Deref<Target = [u8]> + Sized {
         Ok(result)
     }
 
-    // 获取可选头
+    // 作为64位的可选头解析
     fn get_optional_header_64(&self) -> Result<&ImageOptionalHeader64, PEParseError> {
         let file_header_offset = self.get_file_header_offset()?;
         let optional_header_offset = file_header_offset + std::mem::size_of::<ImageFileHeader>();
         let result = self.get_ref::<ImageOptionalHeader64>(optional_header_offset)?;
         Ok(result)
     }
-
+    /// 动态的解析可选头 无论是32位还是64位
     fn get_optional_header(&self) -> Result<ImageOptionalHeader, PEParseError> {
         let is_64_bit = self.is_64_bit()?;
         let result = match is_64_bit {
@@ -136,4 +171,136 @@ pub trait ReadOnlyPE: Deref<Target = [u8]> + Sized {
             Ok(result)
         }
     }
+
+    /// 获取头映射最大可扩容大小
+    fn get_header_max_expand_size(&self) -> Result<u32, PEParseError> {
+        // 最大可扩容大小 = 节对齐大小 - 最后一个节区头最后一个字节的偏移
+        let nt_header: ImageNTHeader = self.get_nt_header()?;
+        let (section_alignment, file_alignment) = match nt_header {
+            ImageNTHeader::NTHeader32(nt_header) => (nt_header.optional_header.section_alignment, nt_header.optional_header.file_alignment),
+            ImageNTHeader::NTHeader64(nt_header) => (nt_header.optional_header.section_alignment, nt_header.optional_header.file_alignment),
+        };
+        let section_header_offset = self.get_section_headers_offset()?;
+        let section_headers = self.get_number_of_sections()? as u32;
+        let last_section_header_offset = section_header_offset 
+            + (section_headers as usize * std::mem::size_of::<ImageSectionHeader>());
+        let mut max_size_of_headers = section_alignment - last_section_header_offset as u32;
+        // max_size_of_headers 向下对齐
+        max_size_of_headers &= !(file_alignment - 1);
+
+        Ok(max_size_of_headers)
+    }
+
+
+}
+/// 可修改的PE trait
+pub trait MutablePE: ReadOnlyPE + DerefMut<Target = [u8]> + AsMut<[u8]> {
+    /// 实现一个get_mut
+    fn get_mut<T>(&mut self, offset: usize) -> Result<&mut T, PEParseError> {
+        let len = std::mem::size_of::<T>();
+        if offset + len > self.len() {
+            return Err(PEParseError::OutOfBounds);
+        }
+        let ptr = self.as_mut_ptr().wrapping_offset(offset as isize) as *mut T;
+        Ok(unsafe { &mut *ptr })
+    }
+
+    /// 获取可变的节区头数据
+    fn get_section_headers_mut(&mut self) -> Result<&mut [ImageSectionHeader], PEParseError> {
+        // 1. 获取节区数量
+        let number_of_sections = self.get_number_of_sections()?;
+        // 2. 获取节区头偏移
+        let section_header_offset = self.get_section_headers_offset()?;
+        // 3. 获取节区头数据
+        unsafe {
+            let ptr = self
+                .as_mut_ptr()
+                .wrapping_offset(section_header_offset as isize)
+                as *mut ImageSectionHeader;
+            let result = std::slice::from_raw_parts_mut(ptr, number_of_sections);
+            Ok(result)
+        }
+    }
+    /// 获取可变的NT头数据64位
+    fn get_nt_header64_mut(&mut self) -> Result<&mut ImageNTHeader64, PEParseError> {
+        let nt_offset = self.get_nt_headers_offset()?;
+        let result = self.get_mut::<ImageNTHeader64>(nt_offset)?;
+        Ok(result)
+    }
+
+    /// 获取可变的NT头数据32位
+    fn get_nt_header32_mut(&mut self) -> Result<&mut ImageNTHeader32, PEParseError> {
+        let nt_offset = self.get_nt_headers_offset()?;
+        let result = self.get_mut::<ImageNTHeader32>(nt_offset)?;
+        Ok(result)
+    }
+
+    /// 获取可变的NT头数据
+    fn get_nt_header_mut(&mut self) -> Result<ImageNTHeaderMut, PEParseError> {
+        let is_64_bit = self.is_64_bit()?;
+        let result = match is_64_bit {
+            true => ImageNTHeaderMut::NTHeader64(self.get_nt_header64_mut()?),
+            false => ImageNTHeaderMut::NTHeader32(self.get_nt_header32_mut()?),
+        };
+        Ok(result)
+    }
+
+    /// 扩大头映射大小，调用者必须要保证当挪动所有节区数据时，不会超出文件范围
+    /// 也就是，调用者必须要在扩大头映射大小之前，先扩大文件大小
+    /// add_size: 需要扩大的大小，不需要进行对齐，会自动对齐
+    fn expand_headers(&mut self, add_size: u32) -> Result<(), MutablePEError> {
+        // aligned_size: 需要增加的大小，对齐后的值
+        let aligned_file_size = self.align_size_with_file_alignment(add_size)?;
+        let max_expand_size = self.get_header_max_expand_size()?;
+        let optional_header = self.get_optional_header()?;
+        let origin_size_for_headers = optional_header.get_size_of_headers();
+        // 如果扩大后超过了最大可扩容大小，就不允许扩容
+        if aligned_file_size > max_expand_size {
+            return Err(MutablePEError::CannotExpandHeader(
+                aligned_file_size,
+                origin_size_for_headers,
+            ));
+        }
+        // 检查一下把，万一调用者没有扩大文件大小
+        let sections = self.get_section_headers()?;
+        let self_len = self.len();
+        let last_section = sections.last().unwrap();
+        let last_section_end = last_section.pointer_to_raw_data + last_section.size_of_raw_data;
+        if last_section_end as usize + aligned_file_size as usize > self_len {
+            return Err(MutablePEError::CannotExpandFileSize(
+                last_section_end as u32 + aligned_file_size,
+                self_len as u32,
+            ));
+        }
+        let mut nt_header = self.get_nt_header_mut()?;
+        let op = nt_header.get_optional_header_mut();
+
+        // 更新可选头的SizeOfHeaders和SizeOfImage
+        match op {
+            ImageOptionalHeaderMut::OptionalHeader32(op) => {
+                op.size_of_headers += aligned_file_size;
+            }
+            ImageOptionalHeaderMut::OptionalHeader64(op) => {
+                op.size_of_headers += aligned_file_size;
+            }
+        }
+
+        let mut_section = self.get_section_headers_mut()?;
+
+        let start_offset = mut_section.first().unwrap().pointer_to_raw_data;
+        let end_offset = last_section_end;
+        // 更新节区头的PointerToRawData
+        for section in mut_section.iter_mut() {
+            section.pointer_to_raw_data += aligned_file_size;
+        }
+        {
+            let self_data = self.as_mut();
+            // 把[start_offset, end_offset)的数据往后挪动aligned_file_size
+            self_data.copy_within(
+                start_offset as usize..end_offset as usize,
+                (start_offset + aligned_file_size) as usize,
+            );
+        }
+        Ok(())
+    }
 }
diff --git a/src-tauri/src/services/mod.rs b/src-tauri/src/services/mod.rs
index 735c4a2..026a865 100644
--- a/src-tauri/src/services/mod.rs
+++ b/src-tauri/src/services/mod.rs
@@ -1,6 +1,13 @@
-use memmap2::Mmap;
-use crate::pe_parse::pe::ReadOnlyPE;
+use memmap2::{MmapMut, Mmap};
+use crate::pe_parse::pe::{
+    ReadOnlyPE,
+    MutablePE
+};
 pub mod file;
 
 // 为文件映射实现PE结构
 impl ReadOnlyPE for Mmap {}
+
+impl ReadOnlyPE for MmapMut {}
+// 为可变文件映射实现可操作PE结构
+impl MutablePE for MmapMut {}
diff --git a/src/components/SectionHeaders/SectionHeaders.tsx b/src/components/SectionHeaders/SectionHeaders.tsx
index bc42714..ebe5717 100644
--- a/src/components/SectionHeaders/SectionHeaders.tsx
+++ b/src/components/SectionHeaders/SectionHeaders.tsx
@@ -12,7 +12,7 @@ import {
   Input,
   InputNumber,
   Select,
-  message,
+  // message,
 } from "antd";
 import { PlusOutlined, EditOutlined } from "@ant-design/icons";
 
@@ -387,6 +387,12 @@ export default function SectionHeaders() {
     });
   };
 
+  const handleRequestExtendLastSection = () => {
+    invoke("command_expand_headers", {
+      expandSize: 0xffff,
+    });
+  }
+
   useEffect(() => {
     requestData();
   }, []);
@@ -406,9 +412,7 @@ export default function SectionHeaders() {
           type="primary"
           icon={<EditOutlined />}
           className={styles.optionItem}
-          onClick={() => {
-            message.info("还没有实现！");
-          }}
+          onClick={handleRequestExtendLastSection}
         >
           扩展最后一节大小
         </Button>