The traditional mode relies too much on the fitter centered operation mode and production management mode, and this mode has long construction period, low efficiency and high labor cost, which is difficult to match and meet the needs of modern industrial production. Based on this, this paper first analyses the mold digital design and manufacturing technology based on computer software, then studies the mold design and manufacturing technology development trend of computer CAD software, and finally gives the specific application of mold digital design and manufacturing based on computer CAD software.