Hydraulic self-unloading rail transfer cart is a kind of hydraulic transfer cart, transfer cart body is divided into two parts, connected by hydraulic cylinders, which can be controlled by hydraulic system to make the upper layer of the overall tilt angle, to achieve the role of automatic unloading of goods. These trucks are widely used in pharmaceutical, pipe and grain enterprises. In fully automated mechanized factories, self-unloading trucks are widely used, and with PLC control system, automated production can be realized.