参考： pdf2image

pip install pdf2image

代码：

from pdf2image import convert_from_path, convert_from_bytes
import os

output_folder = './xx/'
dpi_value= 600
pdf_start_page = 1 # pdf显示的第一页
start_page = 1 # 真实页码
prex = '' # 图像前缀

def to_image():
    def page_generator():# 定义图像前缀
        while True:
            yield prex
    images = convert_from_path(r'xx.pdf', dpi=600, output_folder=output_folder,
                               first_page=pdf_start_page, fmt='jpg', thread_count=6, output_file=page_generator())
   


 
def image_rename():
    # 文件重命名
    global start_page
    file_list = os.listdir(output_folder)
    for file in file_list:
        start_page_str =  str(start_page)
        if len(start_page_str)==1:
            start_page_str = '00'+start_page_str
        elif len(start_page_str)==2:
            start_page_str = '0'+start_page_str
        else:
            ...
        path = os.path.join(output_folder, file)
        print(os.path.join(output_folder, start_page_str + '.jpg'))
        os.rename(path, os.path.join(output_folder, start_page_str + '.jpg'))
        start_page = start_page + 1
to_image()
image_rename() #文件重命名

效果：非常快