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Graphics rendering and performance computing on engine are key steps in rocket design. Analysing the process of solid rocket motor design, we put forward parametric design technology using CATIA. We established combustion chamber and nozzle model, take a single hole tubular charge motor for example, we completed combustion chamber and nozzle parametric design by using CATIA automation secondary development technology, completed the assembly and dynamic display. Then, we implemented the internal ballistic pressure time curve calculation and launch trajectory analysis by using Matcom. Finally, we completed the system software . The application shows that this system can construct motor quickly and conduct a comprehensive performance analysis, which also provide powerful tool for design scheme and preliminary design of solid rocket motor.