Abstract: Based on the rotating mirror ballistic synchronization tracking system of the high-speed CCD camera main axis, the flight attitude and speed of the high-speed flight projectile were studied, the time-space relation model of the rotating mirror moving with the projectile and math model of the mirror motion parameters were established by using the reflection principle and motion law of the rotating mirror, and the mathematics relationship among the rotating mirror motion parameters, the projectile flight speed and the vertical height between the trajectory and the center of rotating mirror was derived.Based on the theoretical analysis, the laws of ballistic width in the field of rotating mirror changing with time, as well as the rules of the rotation angle and angular acceleration of turned rotating mirror changing with time were analyzed by using MATLAB, the field size and the parameter changing curve of rotating mirror at a certain moment were obtained. In addition, the calculating methods for main parameters, such as mirror size, rating curve of scanning, maximum discrete speed, and etc, were provided, and the influences of the factors on the whole tracking system were analyzed. The simulation results show that the system can realize the synchronous tracking of high-speed projectile with the designed parameter h=150 m, v=300 m/s.