irborne optoelectronic stabilized platform has interferences from friction,mass imbalance, motion coupling and airborne environment,which seriously limits the improvement of its stability accuracy.Fractional-order control performs well in the dynamic response and disturbance rejection ability of the system,but it still cannot meet the requirements of high precision and stability under complex disturbances.In order to further improve the boresight stability accuracy of the airborne photoelectric stabilized platform,an improved fractional-order ADRC composite control strategy is designed by combining the fractional-order controller with the ADRC,and taking advantage of the disturbance observation ability of the ADRC and the good dynamic characteristics and strong robustness of fractional-order control.The simulation results and physical experiments verify the effectiveness and feasibility of the improved fractional active disturbance rejection composite control strategy.Compared with the traditional PID control method,the boresight stability accuracy and disturbance isolation degree are greatly improved.