Jon Jones powered through the pain after his big win Saturday -- 'cause he was up on his own two feet dancing the night away ... despite having to be wheeled out of the Octagon.
The light heavyweight champ -- who tied a record with his 13th title fight victory at UFC 239 -- was spotted partying it up after walking away with a split decision W. You can see him here at a club called On the Record at the Park MGM casino and hotel.
He eventually got on the mic and thanked his fans for showing up and showing love, and then continued to boogie.