您可以尝试以下两种方法:

You can try these two ways:

• PdfTK 是处理PDF的实用程序.检查此链接，他们正在执行与您需要的操作类似的操作(在评论中，有人还发布了脚本对于Windows)

• PdfTK is an utility to manipulate PDFs. Check this link, they are doing something similar to what you need (in the comments someone also posted a script for windows)

PDFsam 是强大的图形化工具，可以批量处理PDF. split + merge部分应该可以解决问题.

PDFsam is a graphical powerful tool to manipulate PDFs in bulk. The split+merge sections should do the trick.

这两个都是免费的，如果您要编写可以经常使用的食谱"，我建议先学习，但是如果您必须写一次，则建议以后学习.

Both of them are free, I'd suggest to study the first if you want to write a "recipe" that you can use often, but the later if you have to do it once.