python-docx把dataframe表格添加到word文件中思路较为简单：

1. 先把dataframe格式转变为table
2. 新建一个段落：document.add_paragraph()
3. 把table添加到这个段落下方

效果图

示例代码

from docx import Document, oxml
import pandas as pd
import numpy as np
from docx.oxml.ns import qn
from docx.oxml import OxmlElement
import random# 设置 table 的边框，用法与 cell 类似
def set_table_boarder(table, **kwargs):"""Set table`s borderUsage:set_table_border(cell,top={"sz": 12, "val": "single", "color": "#FF0000"},bottom={"sz": 12, "color": "#00FF00", "val": "single"},left={"sz": 24, "val": "dashed"},right={"sz": 12, "val": "dashed"},)"""borders = OxmlElement('w:tblBorders')for tag in ('bottom', 'top', 'left', 'right', 'insideV', 'insideH'):edge_data = kwargs.get(tag)if edge_data:any_border = OxmlElement(f'w:{tag}')for key in ["sz", "val", "color", "space", "shadow"]:if key in edge_data:any_border.set(qn(f'w:{key}'), str(edge_data[key]))borders.append(any_border)table._tbl.tblPr.append(borders)return tabledef set_table_singleBoard(table):"""为表格添加边框"""return set_table_boarder(table,top={"sz": 4, "val": "single", "color": "#000000"},bottom={"sz": 4, "val": "single", "color": "#000000"},left={"sz": 4, "val": "single", "color": "#000000"},right={"sz": 4, "val": "single", "color": "#000000"},insideV={"sz": 4, "val": "single", "color": "#000000"},insideH={"sz": 4, "val": "single", "color": "#000000"})def convert_df_to_table(document, dataframe: pd.DataFrame, index_list=None, column_list=None):"""把table转为dataframe:param document: 文档对象:param dataframe: dataframe格式数据:param index_list: 最左边一列显示的内容:param column_list: （第一行）列名称需要显示的内容"""rows = dataframe.shape[0]cols = dataframe.shape[1]if index_list is not None:cols += 1if column_list is not None:rows += 1table = document.add_table(rows=rows, cols=cols)row_i = 0col_i = 0if index_list is not None:raiseif column_list is not None:hdr_cells = table.rows[row_i].cellsfor _col_i, _v in enumerate(column_list):hdr_cells[_col_i].text = str(_v)row_i += 1for _i, series_info in enumerate(dataframe.iterrows()):series = series_info[1]hdr_cells = table.rows[row_i + _i].cellsfor _c_i, _cell_value in enumerate(series):hdr_cells[col_i + _c_i].text = str(_cell_value)return tabledef main():# 1. 把要插入的数据调整为dataframe格式dataframe = pd.DataFrame({"列1": [round(random.random(), 2) for _ in range(3)],"列2": [round(random.random(), 2) for _ in range(3)],"列3": [round(random.random(), 2) for _ in range(3)],})document = Document()# 2. 插入表格table = convert_df_to_table(document, dataframe, column_list=dataframe.columns.tolist())table = set_table_singleBoard(table)  # 表格添加边框base_paragraphs = document.add_paragraph("下面插入表格：")base_paragraphs._p.addnext(table._tbl)# 3. 保存修改后的结果document.save('测试_添加表格.docx')  # 保存后导出if __name__ == '__main__':main()

上述代码会得到如下效果图：