In order to improve the disturbance compensation ability of the photoelectric stabilized platform subjected to uncertainties and disturbances,an improved Internal Model Control (IMC) strategy based on Active Disturbance Rejection Control (ADRC) is proposed.The strategy takes the azimuth axis velocity loop simplified by using the current loop as the control object,and uses the IMC to give the desired trajectory of the system output.By introducing a robust control law based on the ADRC into the IMC scheme,the strategy can reduce the effects of model errors and external disturbances on the system,and enhance the system′s anti-disturbance ability.The design procedures of the proposed controller and the structure of the closed-loop control system are given.The high performance of the proposed strategy is validated by comparative simulations.The simulation results show that the proposed strategy has strong robustness to system parameter perturbation,and has higher stabilization precision compared with that of the standard IMC and PI.