The utility model discloses a lawn grinding vehicle. The lawn grinding vehicle comprises a crawler, a lawn grinding roller, an adjustable solar support and a solar panel; the lawn grinding roller comprises a fixing sleeve, the shaft ends, on the two sides of the fixing sleeve, of a rotating shaft are connected with connecting rods, the tail ends of the connecting rods are hinged to the tail of the crawler, and a signal antenna is arranged at the top of the crawler; the adjustable solar support is further arranged at the top of the crawler, the upper end of the solar support is connected with the solar panel, and the adjustable solar support comprises a base, a rotary handle, a rack stand column, a stretchable slant support, a stand column, a slant beam and a transverse beam. The lawn grinding vehicle has the advantages of being good in grass neatening effect, free of grass damage, smooth in grass grinding, high in automatic degree and the like; in addition, the grinding vehicle can automatically run according to a preset route, and manual operation can be completely replaced; meanwhile, the clean and pollution-free regeneration solar energy serves as power, the cost is saved, and the environment is protected; the adjustable solar support is additionally arranged, so that the power generation efficiency of the solar panel is improved.