First, open the PDF editing software, select "Open" in the upper left corner, select to open the PDF file to be split, and click Open.
2. After opening the file, click "Document" at the top of the main interface of the program, select "Split" in the drop-down menu, and click Open.
Third, then, choose the way to split the PDF in the pop-up window.
4. Finally, select the path to save the PDF split file in the window, and click OK to split the PDF file into multiple files to solve the problem.