The invention provides a parking system simultaneously realizing double-layer vehicle parking beside a road. The parking system mainly comprises a parking frame, upright posts, telescopic arms, first fixed pulleys, second fixed pulleys, an ascending and descending bracket, a steel wire rope, wire winding wheels and a motor, wherein the parking frame is fixedly arranged on the ground, the whole body of the parking frame is of a framework structure and comprises four support frames and one support platform, the parking frame comprises two layers of parking spaces (the upper layer of parking spaces and the lower layer of parking spaces), in addition, the upper part parking spaces are distributed and arranged right above the lower part parking spaces, the two upright posts are symmetrically arranged at the two sides of the upper part parking spaces, the whole bodies of the upright posts are cuboids or cylinders, one shaft outwards extends from each upright post, one first fixed pulley is arranged on each shaft, the middle of each upright post is respectively provided with one telescopic arm, one second fixed pulley is respectively arranged at the telescopic end of each telescopic arm, the two wire winding wheels are respectively positioned under the two upright posts, and are driven to rotate by the motor, the steel wire ropes are wound on the wire winding wheels, the ends of the steel wire ropes are fixedly arranged on the wire winding wheels, and the other ends of the steel wire ropes are sequentially wound around the first fixed pulleys and the second fixed pulleys to be connected with the ascending and descending bracket.