The utility model relates to an improved clover-leaf interchange overpass which comprises two highways, sideways and loop ramps. The highways are split-level up and down and criss-crossed, a sideway is arranged on the right side of the two highways respectively and used for communicating with the two highways, a first sideway is communicated with the direction from south to east, a second sideway is communicated with the direction from east to north, a third sideway is communicated with the direction from north to west, and a fourth sideway is communicated with the direction from west to south. The loop ramps are arranged in a first quadrant, a second quadrant, a third quadrant and a fourth quadrant which are surrounded by the two highways according to requirements of the actual traffic flow, vehicles can drive by twining the loop ramps from north to east, from south to west, from east to south or from west to north. The improved clover-leaf interchange overpass is characterized by further comprising directional ramps according to requirements of the actual traffic flow, the directional ramps rounds the loop ramps, and vehicles can directly drive on the directional ramps from west to north, from north to east, from east to south or from south to west.