A-PDF Scan and Split can help you split the scanned PDF file into separate PDFs based on multiple methods. See more at: http://a-pdf.com/faq/how-can-i-scan-paper-document-and-split-them-into-small-pdf-files.htm

2. I have a pile of paper document that I want
to scan into digital edition, but the
document is composed of a large number
of pages, so I want to split the document
into multiple small pieces after scanning it
into PDF file. Do you have any software
that can help me with this? And how to
scan and split?

3. You can try A-PDF Scan and Split. A-PDF
Scan and Split is a versatile utility that works
perfectly with different scanners such as HP
scanner. And as soon as you scan the paper
document into PDF file, this software will
help you split the scanned PDF file into
separate PDFs based on multiple methods: 1)
Split by Barcode page; 2) Split by Blank page;
3) Split by every N pages. And below I will
show you how to scan and split paper
document into small PDF files.

4. After you start A-PDF Scan and Split, select "Scan and Split", and then click
"Next".

5. In the next screen, you can select a Split method to split the scanned file: by
barcode, by blank page and by every N pages. And click "Next".

6. Define Split Method settings;
Select a scanner and define output
quality setting;
Define output settings: choose output
path, select name pattern for split PDFs
and select where to save the separator
page.