The application of parameterization in grain burning surface calculation of solid rocket motor was investigated based on SolidWorks application programming interface.Asimpler and more accurate grain burning surface calculation method was developed while grain burning surface calculation was achieved through different modeling methods for the burning process of grain.The results show that this calculation method is feasible and highly precise.The calculation results match the experiment results
so this calculation method is suitable for actual engineering calculation.Some new ideas and methods for grain burning surface calculation were also proposed.