Crossroad of overground two-layer square pavement and underground well type furcated way

A crossroad has an overground two-layer square pavement and an underground well type furcated way, by which vehicles and passerby may pass successfully without traffic lights. The square pavement of the present crossroad serves as the square pavement of the first layer crossroad of the utility model, four subway entrances and four subway exits are opened along the pedestrian ways around the pavement, four subways are built undergroud along the four subway entrances respectively and are communicated with the four subway exits respectively, wherein the four subways forms upper-lower crossway, so as to form the underground well type furcated way; a square pavement of the second layer crossroad of the utility model is built above the present square pavement, the height of the second layer square pavement is adequate for the trolley-bus to pass through, the first and the second square pavements form an overpass state at the crossroad; the opposite sides in E-W direction of the second square pavement are provided with four parallel ramps (two up-ramps, two down-ramps) respectively, the opposite sides in S-N direction of the second square pavement are provided with two ramps of the extending road surface serving as down-ramps.