The invention provides a flyover and provides an intersection three-layered flyover. The intersection three-layered flyover has three layers; the first layer comprises six lanes; the second layer comprises five complete lanes and two incomplete lanes; the third layer comprises three complete lanes and two incomplete lanes; the No. 11 lane and the No. 12 lane pass through two bridge decks of the second layer and the third layer at the same time and the other lanes only pass through one bridge deck; the bridge decks of the second layer and the third layer of the flyover commonly have ten lanes. The ten lanes have no conflict through reasonable movement directions and reasonable positioning of the ten lanes. The flyover has sixteen lanes and the sixteen lanes comprise four straight-going lanes, four right-turning lanes, four left-turning lanes and four turning-around lanes. The flyover has no ramp. In order to solve the passing problem of pedestrians, four pedestrian paths are arranged on the ground of the first layer of the flyover; meanwhile, a road traffic light, which is commonly used by the pedestrians and traffic, is set.