Compared with the traditional PID control method, the Auto Disturbance Rejection Control (ADRC) strategy has many advantages and is applied to various areas.In this paper, the ADRC strategy is used to control the fine tracking part of the optical communication APT system. Firstly, the effect of linear auto disturbance rejection parameters on the perturbation of the APT system is analyzed.Then, the ADRC strategy is applied to the experimental simulation, a real-time estimation of the perturbation of the APT system is made, and the perturbation is compensated by the loop in the control quantity. Finally, the ADRC parameters are set to improve the noise suppression effect of the fine tracking part and the tracking accuracy of the APT system. The experimental results show that applying the ADRC strategy to the fine tracking part of the optical communication APT system can reduce the tracking error of the system, improve the system's fastness, enhance the robustness of the system, which meets the requirements of high control accuracy and noise suppression of the spatial optical communication APT system.