Based on the analysis of exterior ballistic calculation method, in trajectory calculation process, it is difficult to predict real-time flight attitude problem. In this paper, the air dynamics software was applied to projectile aerodynamic simulation analysis, dynamic parameters under different Mach number and different angles of attack were got for discrete tables. The kinematics software on projectile throughout the flight simulation, direct the projectile in the exterior ballistic stability, flight trajectory, and the trajectory. Compared with the experimental data, the error is not serious. The correctness of the analysis was verified, the new method can be used for complex exterior ballistic model computation.