In metal, wood, and application market, the shredder is capable of reducing volume of rubber and other materials. As a double shaft crusher with low speed shear crushing equipment, it has a wide range of applicability, and this machine can solve the problem of crushing waste material (including metal, wood, plastic, stone, rubber, etc.) in the double shaft shear crusher. It is a new type of crushing to replace single use crushing equipment. The application of this machine will accelerate the profit of garbage disposal in China, and thus promote the continuous development of the process of harmless recycling of garbage in China. The double shaft shearing crusher is a kind of double rotor claw knife grinding equipment. The machine is currently used for coarse crushing of refuse and various waste resources for a long time. It has been applied to various kinds of plastics for a long time.