LE-QD series ground track is traction conveyor, which can be understood as the deformation type of suspended conveyor. Chains with tractors (pushers) are placed in track grooves, and the top of the pushers is equipped with special tooling or traction trolley to transport objects along the track of the chains. During the operation of the line body, it can be combined with water curtain cabinet, tunnel furnace, cleaning shed and other equipment to form a painting production line.