Mitch Green angrily threatened to withdraw from his scheduled 10-round heavyweight fight with Mike Tyson tonight after learning he would receive less than one-sixth of the lucrative purse guaranteed his popular opponent, but he later relented.

Green flew into a rage at yesterday's morning weigh-in, screaming that he has been mistreated by promoter Don King and his son, Carl King, who is Green's manager. Green calmed down a few hours later and said he would go ahead with the bout.

Green, 29, of New York, became angry after learning he was to get paid $30,000 plus $5,000 in expenses compared to more than $200,000 for Tyson. Green's purse is to be paid by Don King; Tyson is being paid as part of a three-fight deal with Home Box Office, which will televise the bout from Madison Square Garden. . . .

Former world heavyweight champion Larry Holmes, saying there is "no doubt" that boxing judges take bribes, called for a major overhaul of the New Jersey boxing industry before an Assembly committee looking into boxing reform measures.

Holmes urged the committee to change judging procedures, saying judges play favorites and "no doubt" take bribes to affect the outcome of a match.