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 .