Abstract: Basing on the Lagrange-Maxwell equations of electromechanical dynamics, a tracking system of azimuth and elevation is studied, and the non-linear biaxial coupling electromechanical dynamics model of azimuth and elevation is established. Taking certain high-power microwave antenna as example, the electromechanical control simulation by the PID algorithm is made. The simulation results show that the electromechanical dynamics model of the azimuth-elevation tracking equipment is proper, and it also provides a theoretical foundation for virtual reality study of target tracking systems.