Unmanned subsoiling, crushing and leveling scarifier

The invention provides an unmanned subsoiling, smashing and leveling scarifier which comprises a rack, a subsoiling, smashing and scarifying device is arranged at one end of the rack, and a counterweight assembly is arranged at the other end of the rack; the counterweight assembly is arranged at the end, away from the deep ploughing, smashing and soil loosening device, of the rack, so that the two ends of the rack are kept balanced; the deep ploughing smashing and soil loosening device comprises a cutter, the cutter comprises a blade, the blade comprises a front portion arranged on one side and a rear portion arranged on the other side, one end of the blade is provided with an end, the front portion is provided with a first cutting edge, and a step portion is arranged at the end, close to the end, of the blade and between the rear portion and the front portion. The horizontal height of the step part is higher than that of the first cutting blade; a second cutting blade extends outwards from the top surface of