Screening machine is used for textiles, chemical fiber, glass fiber, chopped cotton and linen goods, paper products, chemicals, plastic waste and other specialty products industries. The screening machine uses eccentric wheel, dual link, overall large funnel, the structure operation of long-distance conveyor belt, advanced structure, variable frequency reciprocating motion, processing ability, low noise, easy maintenance, rugged features. After shearing the material, the proportion is very light, screening machine can not be completed in the other screen filter separating the case of mixing the material back and forth to make screening more thorough, the production process of materials with large grain sieve block slide forward slopes, and required the material through the overall funnel into the belt to be sent to collect.