Four-rotor aircraft capable of automatically leveling

The invention discloses a four-rotor aircraft capable of being automatically leveled, and relates to the field of unmanned aerial vehicles, the four-rotor aircraft comprises a center rack, a bearing platform, rotor supporting rods, rotor assemblies, arc-shaped racks, annular racks and undercarriages, the two arc-shaped racks are slidably connected into annular grooves formed in the inner walls of the annular racks by means of second sliding blocks arranged at the upper ends and the lower ends of the arc-shaped racks; the two annular racks are connected with the other two arc-shaped racks through transverse racks arranged on the two sides of the annular racks, rotating pieces are installed in the first sliding blocks located outside the annular racks, and supporting pieces are installed in the first sliding blocks located in the annular racks. When landing on some uneven grounds, the unmanned aerial vehicle can automatically return to a parallel state through gravity, so that the effect of taking off and landi