follow these steps :
1. Sign in to Evernote, and then open the "File" menu.
2. Select "Import," and then choose "Microsoft OneNote" from the submenu to open the OneNote Import wizard.
3. Click the drop-down box, and then select the Notebook that has the files you want to import.
4. Click the check box next to each section that you want to import.
5. Click the "OK" button to import the OneNote files.
6. Click the "Yes" button on the Data Import Successful dialog window.
hope this helps!