Applicantion: It used for separating long and short fiber in stock in pulp making processing,so that they can be handled and used respecitively. Design Feature: Special rotor structure,ensure an unfied speed of fiber passing through screen slot on the high of whole baket,overcome the phenomenon of increasing consistency effective. Proturde shape and optimized arrangement of rotor,making a fluidization of screening area,even pulse high tradting consistency strong fiber fractionation effect.