Mike Tyson isn't letting his violent plane beatdown ruin his high -- the boxing legend smoked like a chimney alongside Rick Ross and Ric Flair Thursday night ... around 24 hours after he punched the crap out of a man.
Iron Mike was grinning from ear to ear with the rap superstar and wrestling legend during the Benzinga Cannabis Capital Conference afterparty at LIV in Miami ... taking the stage and sparking up as the crowd cheered below.
Tyson was initially supposed to speak at the weed conference Thursday afternoon alongside the Nature Boy ... but after his violent altercation with an apparent heckler, event organizers said his scheduled appearance was scrapped "due to a flight change."
Tyson seemingly made up for the scheduling conflict at the afterparty ... although it's unclear if he addressed the incident with folks in attendance.
TMZ Sports broke the story -- Tyson repeatedly punched a man on a plane at SFO on Wednesday ... after the passenger allegedly threw a water bottle at him.
Our Tyson sources claim the man was completely wasted -- and wouldn't stop provoking him until the beatdown.
The 55-year-old boxing legend was also super friendly with fans in Miami following the incident on Thursday ... posing for pictures and meeting supporters outside a hotel.
Safe to say Tyson's not sweating it one bit.