本片讲述的是一代宗师黄飞鸿年少时代一段历险。民初年间,年轻的黄飞鸿(成龙 饰)自学了一套威力无穷的拳法——醉拳。但是每次打出这套拳法,都要先喝得酩酊大醉,利用醉态打破一切武学定律,才能发挥出醉拳的威力。因为这样,黄飞鸿父亲黄麒英严禁儿子练这种有伤风雅、而且违背习武强身法则的拳法。 年少顽皮的飞鸿常常背着父亲在练习醉拳,并以此打败了众多强手。这天,飞鸿和父亲一起上东北办事。半途上,父子俩遇上了一伙外国强盗,他们暗中将国宝玉玺偷运出境。为了阻止这伙强盗、夺回国宝,飞鸿只好使出他的拿手绝活——醉拳!Returning home with his father after a shopping expedition, Wong Fei-Hong is unwittingly caught up in the battle between foreigners who wish to export ancient Chinese artifacts and loyalists who don't want the pieces to leave the country. Fei-Hong has learned a style of fighting called "Drunken Boxing", which makes him a dangerous person to cross. Unfortunately, his father is opposed to his engaging in any kind of fighting, let alone drunken boxing. Consequently, Fei-Hong not only has to fight against the foreigners, but he must overcome his father's antagonism as well.