The flat car is a kind of track type transportation vehicle, which needs to lay the track on the ground. The track is generally I-shaped surface contact track. Secondly, it is an electrically driven vehicle, which operates automatically under the drive of motor reducer. Thirdly, it is a flat car, with flat table surface and no car cover. Under special circumstances, it can also be non planar but without car cover. The car body has no steering wheel and only has forward and backward directions (even if it turns, it turns by the track).

Because of its convenience, stout, economic, practical, easy to clean and many other advantages, it has become a short-distance fixed-point and frequent means of transportation of heavy objects within and between factory buildings.