My macbook cannot download macos. I have quit update, but it does not work. I need my mac to work, but It’s not come back to normal creen.

See this Link and see if it can be of help If your Mac starts up to an Apple logo or progress bar - Apple Support

Do you have access to another Mac? If so, you can make a bootable Mac OS installer if everything went wrong.

If your Mac starts up to an Apple logo or progress bar - Apple Support

And I hope you have made a time machine backup before updating

1 - Restart in Safe Mode. This will perform a Disk Repair, clear cache files and only load Apple Software, extensions and fonts. The boot up will be slow and can take some time - Normal.

2 - Does the issue present in this mode ?

3 - Sometimes a Safe Boot followed by a Normal Boot will just put things right.