Welcome to the forum I had to do some checking and I found this on droidforums.net I have not tested it out as of yet I keep my excel files on my tablet but you can give it a try
Download astro file manager...
After do this:
Hold home screen, click add shortcut. Click astro. Find the file, name it when asked. Done..this answer is from member xixgrimmxix ..Let us know know if this works thank you