Abstract: To research the influence of the design of the fiber conveyor on the fibers′ conveying,unwinding,and separating in disc swirl spinning machine,the numerical method was employed to analyze and design the dimensional form of the fiber conveyor of disc swirl spinning machine.That is to simulate the fluid field in the fiber conveyor with CFD code,and modify the fiber conveyor form with CAD software based on the simulation results.This paper takes the straight wall type fiber conveyor as an example,a feasible design method is put forth,and the error analysis of the related test is carried out,and a novel fiber conveyor is presented.This paper provides creative thoughts in modifying the design of fiber conveyor.