How to import Excel file to CCK nodes?
You'll probably have to save your Excel file to CSV format to be able to import more easily. Two options:


Node Import: You can certainly import CSVs with this, and I've used it successfully for huge spreadsheets before -- it's powerful, helpful and quite easy.
Feeds: Much more complex to get going than Node Import, but Feeds can in theory do everything you want and much more. Can also update existing nodes.


Either of these will allow you to import CSV data (exported from your Excel document) to nodes and their CCK fields.