在分析了目前CAD技术的发展情况的基础上 ,针对我国国情 ,提出了设计适合国情的通用普及型CAD软件的见解 ,介绍了作者参与研制的机械CADIS系统。在系统实施过程中 ,我们提出并使用了独具特色的智能导航技术 ,着重对此技术进行了研究和探讨 ,并以转轴的设计为实例演示了其实施情况 Based on the analysis of the current development of CAD technology, according to China’s national conditions, put forward the design of common universal CAD software for the national opinion, introduces the author involved in the development of mechanical CADIS system. In the process of system implementation, we propose and use a unique intelligent navigation technology, focusing on this technology has been studied and discussed, and the design of the shaft as an example to demonstrate its implementation