Dillon Danis just got himself blacklisted from the UFC ... because Dana White says the fighter is banned forever after igniting a wild brawl cageside at UFC 322.
The chaos exploded Saturday night inside Madison Square Garden in NYC ... moments before the main card kicked off when Danis got into it with several members of Islam Makhachev's squad.
Videos captured the scene ... showing Danis mixing it up with Abubakar Nurmagomedov and Magomed Zaynukov as security rushed in to break things up.