Python Word设置页面边距纸张大小教程

用python-docx设置Word页面纸张大小（A4/A3）、上下左右边距、横向纵向，批量调整多个文档的页面布局，适配打印和标准格式要求。

场景痛点

公司要求所有正式文档统一用A4纸、上下边距2.54厘米、左右边距3.17厘米。手里一堆文档有的边距不对，有的是A5纸，有的方向是横向，打印出来格式乱七八糟。手动打开每个文件进页面设置改，几十份文档点几十次。用python-docx可以批量设置纸张大小和边距，一键把所有文档调成统一格式。

用到的库

pip install python-docx

完整代码

# 导入库
from docx import Document
from docx.shared import Cm, Mm
from docx.enum.section import WD_ORIENT
import os

def set_page_layout(section,
page_width=21.0, page_height=29.7,
margin_top=2.54, margin_bottom=2.54,
margin_left=3.17, margin_right=3.17,
orientation='portrait'):
"""
设置单个节的页面布局
page_width/page_height: 纸张宽高，单位厘米
margin_*: 四边边距，单位厘米
orientation: portrait纵向 / landscape横向
"""
# 设置方向
if orientation == 'landscape':
section.orientation = WD_ORIENT.LANDSCAPE
# 横向时宽高互换
section.page_width = Cm(page_height)
section.page_height = Cm(page_width)
else:
section.orientation = WD_ORIENT.PORTRAIT
section.page_width = Cm(page_width)
section.page_height = Cm(page_height)

# 设置四边边距
section.top_margin = Cm(margin_top)
section.bottom_margin = Cm(margin_bottom)
section.left_margin = Cm(margin_left)
section.right_margin = Cm(margin_right)

# 页眉页脚距边界距离
section.header_distance = Cm(1.5)
section.footer_distance = Cm(1.75)

def set_a4_standard(input_path, output_path, orientation='portrait'):
"""按标准公文格式设置页面：A4纸，上下2.54cm，左右3.17cm"""
doc = Document(input_path)

# 文档可能有多个节，全部设置
for section in doc.sections:
set_page_layout(
section,
page_width=21.0,    # A4宽21cm
page_height=29.7,   # A4高29.7cm
margin_top=2.54,
margin_bottom=2.54,
margin_left=3.17,
margin_right=3.17,
orientation=orientation
)

doc.save(output_path)
print(f'页面设置完成：{output_path}')

def batch_set_page_layout(folder_path):
"""批量处理文件夹下所有docx"""
for filename in os.listdir(folder_path):
if filename.endswith('.docx') and not filename.startswith('~'):
input_path = os.path.join(folder_path, filename)
output_path = os.path.join(folder_path, 'A4排版_' + filename)
try:
set_a4_standard(input_path, output_path)
except Exception as e:
print(f'处理失败：{filename}，错误：{e}')

if __name__ == '__main__':
# 单文件设置为标准A4纵向
set_a4_standard('demo.docx', 'A4排版_demo.docx')

# 设置为横向A4（适合宽表格）
# set_a4_standard('宽表格.docx', '横向_宽表格.docx', orientation='landscape')

# 批量处理文件夹（取消注释）
# batch_set_page_layout('./word_files')