The precision and fineness of magnetic powder particles are important factors affecting the performance of magnetic composite materials, and also determine its market value. Therefore, in the production process of magnetic powder, the screening process is an important part, but due to the high hardness, strong viscosity, Due to the characteristics of easy clumping and easy flying, the phenomenon of magnetic powder clumping and net blocking during the screening process is particularly serious. At the same time, the problems of dust flying, environmental pollution, and loss of raw materials in the traditional screening process have always been a major problem in the production of magnetic materials. troubled.