Over the past few years the country vitalizes machinery industry, each industry that related with mechanics is all paying more and more attention to the CAD/CAM technology. That is not only because CAD/CAM technology has already been developed into one ripe generality technology, but also because 3D design of Plastics piece make and mould and 3D analysis of molding process plays a more and more important role in plastics mould industry. In the graduation project, through using 3D entity sculpting software Pro/Engineer (Pro/E for short), I build 3D mold of “Co-pilot air bag cover”, also build the plastics injection 3D mold of the shell crust at the same time.;I chose the appropriate mold frame and made it fixed with the mold , according to the measurement of the mold. Finally I do the intuitionistic drawing of 3D mold as well. In addition, also has drawn up the mold assembly drawing as well as each kind of Molding Parts drawing using CAD . This is that the first time makes use of the software drawing to carry out design on package mould , have carried out all-round consolidation on what be learned knowledge,The significance is significant!