Crop straw crushing treatment device with adjustable crushing function

The invention relates to the technical field of agricultural production, and discloses a crop straw crushing treatment device capable of adjusting crushing, the crop straw crushing treatment device comprises a crusher shell and a millstone, the millstone rotates in the crusher shell, and a speed adjusting assembly for adaptively adjusting the grinding rotating speed is arranged in the crusher shell; an anti-caking assembly used for preventing adhesion of smashed straw is arranged in the crusher shell. A first gear slides on a first bevel gear and a second bevel gear when a millstone is pressed downwards, so that the meshing position of the first gear and the first bevel gear is adjusted, the rotating speed of a crushing roller and the millstone can be actively increased when the pressure on the millstone is relatively large, and when the equipment is used for treating relatively many straws, the crushing efficiency is improved. Straw can be crushed into broken residues and broken rods through high-speed rotat