how to keep cats away from my christmas tree

Hmm...... Well, you could try placing a few cat toys around the base of the tree. That way, they'll be more focused on playing with those instead of climbing up the tree. You could also try placing some citrus or lavender essential oil around the base of the tree. Cats typically don't like those scents, so it might keep them away. Lastly, you could try placing a few cat deterrents, like air sprays or ultrasound devices, around the tree to keep them away.