First of all
visit this source, which might be interesting to you:-
How to Repair a
Corrupt XLSX File
to the folder containing the XLSX file you want to repair.
the file and select “Copy” and then right-click on a blank space
within the folder and select “Paste.” This action generates a backup
copy of the corrupted file.
Microsoft Excel 2007 or later.
the “Office” button in the top left corner of the window and select
to the folder containing the copy of the XLSX file you generated previously and
select it by single-clicking its icon.
the arrow located to the right of the “Open” button and select
“Open and Repair.”
“Repair.” If you previously attempted this method and the process
failed, try to extract only the values and formulas by selecting “Extract
Data” instead. Regardless of the method you choose, your data will appear
on the screen within a few seconds if the process completes successfully.
Or you may try
How to recover
excel files also may show you Excel Repair Toolbox
free-to-try, but why not to try-http://www.excelrecoverytool.com/