Abstract: System integration of injection molding part modeling and analysis is a hotspot. For injection molding part/mould, the course of CAD-CAE has problems of intelligence-absence and information-loss; while the course of CAE-CAD also has the problem of lack of information coupling and expert reasoning. In this paper, a case-based reasoning (CBR) system is used to obtain the proper process parameters. Then combining the output of CBR with the filtered information from CAD, CAE software is applied to simulate the molding process. Coupling the feature information from CAD with output from CAE, an intelligent deficiency interpretative expert system is set up. The focus of this paper includes the CBR system for process parameters optimization, intelligent expert system of CAE post-processing and the routing of data flow. The idea of circle round of CAD/CAE is proposed to facilitate the intelligent integration of feature-based modeling and analysis of injection molding part.