Abstract: To deal with problem of complex modeling for FEA process, the parameterized FEA expert system based on intelligent voice interaction was developed. According to the research on parameterization, intelligent voice interaction and reuse, function and flow of expert system were studied. Through voice recognition, expert system and parameterized FEA, qualitative design and quantitative design were combined. Parameters were adjusted automatically in the FEA process . The key technologies of expert system was studied, refer to implementation methods of intelligent voice interaction and parameterization design based on case-based reasoning. Then the paper discusses the improved interoperation technology of VC++ and CLIPS, and come up with a method of improved interoperation technology. An example of structure analysis of middle frame of belt conveyor was given, and implementation method of the parameterized FEA expert system based on intelligent voice interaction was developed. The results show that the software lighten work strength and raise working efficiency. Key words: expert system; iFlytek Input; tree structures of Design and selection; the parameterized FEA