The traditional cold extrusion process is often determined according to experiences and by repeatedly testing and repairing dies. Its production cycle is long, and costs is high. Wear problems of end corner of transmission gear extrusion were numerically simulated. Forming process was optimized into a composite extrusion forming based on Deform-3D software. The maximum stress, the maximum strain and the maximum total-velocity in two kinds of scheme(optimized one step composite extrusion forming and the orig...