In order to solve the problems of the design and simulation analysis software portability and interoperability deficiencies of existing heavy engineering vehicle brake system,by using the Browser/Server and Client/Server hybrid structure,combined the JSP.Servlet technology and structural design,secondary development technology of finite element and numerical computing system,the heavy engineering vehicle braking system is built,the system has the modules of matching vehicle performance,wet brake structure parameter optimization,wet brake performance analysis and wet brakes isothermal design.The results show that heavy engineering vehicle brake system design methodology based on WEB technology has certainly feasibility,the method can simplify the braking system design costs,improve the design efficiency.