Abstract: The design of cam mechanism is a complicated process which contains multi-factors and multi-levels,and many of the formulas can not be standardized.Combined with the development of Visual Basic and Access database,this system uses the expert knowledge base to maintain and modify the knowledge base to build the cam mechanism of intelligent design system .This system not only makes it convenient for users to operate,embodying the system's usability and intelligence,but also has practical significance for improving the design of cam mechanism.

Key words: cam mechanism, knowledge base, design, VB, database construction