In order to accelerate the efficiency of research and development for new products and in light of the current numerous CAD, CAM softwares and the practical situations of CNC machine tools, etc. in our Center, CAD/CAM/DNC integration & networked platform is established and the respective advantages of softwares are utilized so as to realize the research and development of complex curved surface mechanism parts. The method tactfully utilizes the advantages of current powerful popular softwares and, through their powerful cooperation and respective functions, completes the research and development of complex curved surface mechanism parts based on network CAD/CAM/DNC, significantly improving the efficiency of research and development for new products.