A Linear Auto Disturbance Rejection Controller(LADRC) is designed to eliminate the disturbance from the variational aircraft gesture angle velocity on forward image motion compensation of the reflector in an aerial camera. The research includes the equivalent relation between angle velocity and torque disturbance, as well as the estimation and compensation methods of disturbance. Firstly, the influence of angle acceleration on the image motion compensation is analyzed. Then, a mathematic model of reflector system is established with consideration of the torque disturbance, and a linear extended state observer to estimate the disturbance and a control law with disturbance compensation link are designed. Finally, an experiment on the reflector is performed to test the control performance of the LADRC. Experiment results indicate that residual error of LADRC is within 1.4%, which has reduced 75% as compared with that of traditional lag-lead compensation method.Furthermore,the stable state speed precision of the LADRC reaches 0.25%. In conclution,the control method improves the reflector performance of cameras in speed precision and robustness.