The invention discloses a rear cantilever type simple parking device lifting through chains. The device comprises components as follows: lifting motors, lifting motor gears, driving shafts, chain baffles, transmission chains, lifting chains, traverse motors, standing column assemblies, beam assemblies, lifting frame assemblies, second layer car carrying board assemblies, first layer car carrying board assemblies, diagonal draw steel bars, diagonal draw steel bar folding guiding plates, lifting frame guiding shafts, rollers and the like. The rear cantilever type simple parking device achieving lifting through chains enables second layer car carrying boards to be lifted safely and stably and achieves the anti-falling function of the car carrying boards at the position of the second layer; accurate positioning and lateral moving of the rear cantilever type simple parking device at the first layer is achieved, and slipping and car sliding are prevented; the safety and the reliability of the rear cantilever type parking device are improved; and the requirements of small size, simplicity and practicality for mechanical parking devices are met.