Double-image step flyover

The invention relates to a double-image step flyover which comprises four right turn ramps, two through lanes, four left turn ramps and two through lanes, wherein the four right turn ramps and the twothrough lanes are arranged on the ground; and the four left turn ramps and the two through lanes are arranged on a bridge. In the invention, the two through lanes in a master line direction are separately arranged, and move for a section of distance to form double humps so as to form the step flyover, and the four left turn ramps penetrate through the step flyover. The through lanes and the leftturn ramps form the step conversion, and the right turn ramps and the left turn ramps form the image conversion. The flyover is in double-shaft symmetry around a center shaft of an intersection. The invention has the advantages that two layers of completely interchanged flyovers are built at the 60m-wide crossing, the occupation area is less, the traffic flow is large, ground-based rail traffic isremained between the two l