Thinking of low information level in SMEs put forward a new idea to integrate CAx system online. Taking “feature modeling” and “object-oriented” thinking developed a Web-based prototype system. First, it describes the integration of Model information and XML data model, using tree structure to organize CAx data, via VRML to display parts online and implement interaction dynamic. Finally, it develops a prototype system. Through test, it finds that the function of platform and the system is powerful and integration is good. The platform can basically meet the requirements of SMEs in information.