Abstract: Based on orthogonal experiment and Matlab the solid conveying section of the single screw extruder was multiple target numerical simulated,the influence of geometrical parameter of the screw on the efficiency and rate of solid convey section and the optimal combination of screw parameters were obtained. The simulation result had a high reliability, with which the design cycle of screw can be shortened,and the costs of research and development can be reduced.

Key words: orthogonal text , solid conveying section, optimization design