The invention discloses a gravitational energy self-driving vehicle, and belongs to the technical field of mechanical manufacture. The technical problem to be solved is that: the gravitational energy is converted into mechanical kinetic energy, and the application of new energy source gravitational energy is realized. The gravitational energy self-driving vehicle has the main technical characteristics that: the 'gravitational energy hydraulic rotator' is used on the vehicle so as to drive the vehicle by the load; the loaded objects press on a piston rod plate of a stressed cylinder to generate the hydraulic pressure; both the hydraulic pressure and an energy storage spring in the cylinder make working cylinder plunger heads on symmetrical edges of two eccentric wheels stretch, so that the eccentric wheels rotate and transmit the rotation to the wheels through a transmission mechanism. Therefore, the gravitational energy is converted into the mechanical kinetic energy. The gravitational energy self-driving vehicle has the advantages that: 1, the gravitational energy self-driving vehicle is mainly used as a means of transportation for carrying people or objects, does not employ fuels as energy sources, and has the advantages of convenient use, no pollution and low cost; and 2, the 'gravitational energy hydraulic rotator' can rotate under the condition of loading heavy objects, and the gravitational energy can be converted into the mechanical kinetic energy.