Abstract: In view of the high requirements of attitude control in flight control system and the various unknown disturbances and parameter uncertainties in flight, a fuzzy parameter optimization of active disturbance rejection control strategy was proposed to achieve the high performance of attitude control for tandem UAV. The transition process was arranged to reduce overshoot and improve response speed, and the extended state observer was designed to deal with unknown disturbances and parameter uncertainties. To improve the dynamic performance of control system, the fuzzy control was used to realize the online adjustment of the gain of nonlinear feedback control law. The simulation results show that compared with the conventional PID and fuzzy PID control, the fuzzy parameter optimization of active disturbance rejection control strategy can suppress the disturbance quickly and effectively with high control accuracy and strong robustness.