Hydraulic primary shredder is one of the main shredding equipment with high production efficiency for solid waste shredding, which is mostly used in the first process of various solid waste shredding. The two-shaft shredder is mainly composed of main shaft, cutters, middle counter cutters, shredding chamber, power system, etc. The cutter rollers are directly driven by low speed and high torque dual hydraulic motors. The material is treated by shearing, tearing and pulling by the interaction between the moving cutters and the middle counter cutters. It has the characteristics of large crushing force, high output, low noise and good stability. Usually used in various solid waste crushing treatment, domestic waste crushing treatment, waste volume reduction and other fields; wide applicability of materials, high crushing efficiency.