The present invention discloses a solar sweeping vehicle sun tracking gravity self-adaptive level control device, a core part is: when the solar sweeping vehicle works, an elevation pushing rod pushesa solar panel to rotate around an azimuth bracket hinge axis to control a solar panel elevation angle, an azimuth motor controls an azimuth of the solar panel, the azimuth motor and the transmissionmechanism are installed in lower part of a universal ball for vertical counterweight of the upper solar panel and an azimuth bracket, under the action of gravity, the azimuth bracket rotates around auniversal ball shaft to maintain level, thereby realizing gravity adaptation function of the vehicle-mounted solar panel. The function of horizontal control. In the picture: 1 the solar sweeping vehicle, 2 a GPS satellite sensor, 3 a sun tracking controller, 4 the azimuth bracket hinge axis, 5 the solar panel, 6 the elevation pushing rod, 7 the azimuth bracket, 8 the universal ball shaft, 9 the azimuth motor, 10 an azimuth hinge axis, 11 an azimuth control lever, 12 an azimuth axis, 13 an elevation angle pushing rod axis.