The distribution of residual stress field in perforated disks is studied through numerical simulation method. Because of the limitation of current measurement technology, the feasibility of using 3D finite element model for numerical simulation is analyzed. The results show that the degree of cold expansion (DCE) has the greatest effect on the area of the wall near the upper surface. Furthermore, the overlarge DCE will make the tangential compressive residual stress field in this area no longer exist. It is also found that TC4 titanium alloy single-hole circular plate is more suitable for the cold extrusion process than 7050–T7451 aluminum alloy perforated circular plate.