Wheat and rice straw grinder adopting biaxial crossed disk hobs

The utility model discloses a wheat and rice straw grinder adopting biaxial crossed disk hobs. The straw grinder comprises a main frame, wherein a driving shaft and a driven shaft are rotationally mounted on the main frame; a plurality of groups of mutually-matched crossed biaxial crossed disk hob blades are mounted on the driven shaft respectively; and fixed cutter blades opposite to and matched with the crossed biaxial crossed disk hob blades are fixedly arranged on the inner wall of the lower part of the main frame. Through the adoption of the mechanism that the crossed biaxial crossed disk hob blade groups rotate and cut the straws and the hob blades rotate in a high speed and are matched with the fixed cutter blades for straw grinding, the straw grinder further reduces the grinding length of the straws, and the average qualification rate of the ground straws with the lengths less than 5 cm is higher than 90 percent. The biaxial straw grinder has good performance and achieves the purpose of energy conserv