import fitz  # PyMuPDF
source=r'D:\BaiduNetdiskDownload\大数据研究苏轼\[047.中国古典文学基本丛书.苏轼词编年校注].王宗堂,邹同庆撰.扫描版.pdf'
pdf = fitz.open(source)
for page_num in range(len(pdf)):
    page = pdf.load_page(page_num)
    pix = page.get_pixmap(dpi=300)
    pix.save(f"D:/usr/page_{page_num}.png")