Gravitational potential energy power generation system

The invention belongs to the technical field of gravity energy storage, and particularly discloses a gravitational potential energy power generation system which comprises a vertical supporting device, a slidable weight, a power generation device and two annular rails. The two annular rails are arranged on the two opposite side walls of the vertical supporting device correspondingly. The two sides of the slidable heavy object are connected with the annular rails on the corresponding sides respectively, and the slidable heavy object slides on the annular rails; the power generation device is connected with the vertical supporting device and connected with the slidable weight in the descending state, and the power generation device is used for generating power by means of gravitational potential energy generated when the slidable weight descends. According to the gravitational potential energy power generation system, sliding of the slidable heavy object can be achieved only by consuming a little externally inp