Organizers found out Yiannopoulos was attending after he announced it on his Telegram messaging channel - one of the few social media platforms that still allow him, after he was banned for life from Twitter.
He shared a picture of his $300 ticket to the December event which noted he was going in a snow leopard costumer.
Yiannopoulos also claimed on Telegram that he had submitted a form to suggest he host a panel called 'The Politics of Fur.'
He asked his followers who plan to attend to message him to arrange 'dinner, drinks, photos or anything else.'
Organizers released a statement saying "'Hate is not welcome. We are dedicated to providing a safe, harassment-free convention experience for all, regardless of age, race, gender, gender identity or expression, sexual orientation, disability, physical appearance, or personal beliefs. The board, consistent with our posted code of conduct, has rescinded Mr. Yiannopoulos's registration. He is not welcome to attend this or any future events.