The purpose of this paper is to improve the stabilization accuracy of airborne electro-optical stabilized platform.Analysis is made to the working principle of the stabilized platform, based on which a stabilized control loop is modeled.The factors that have effect on the stability accuracy and the deficiencies of classical control algorithm are analyzed briefly.An improved algorithm is then presented based on Active Disturbance-Rejection Control (ADRC).At first, the model of motor is simplified.Then, an extended state observer is designed to estimate the disturbance in real time and a feedback control law with disturbance compensation is designed.Eventually, simulation is made to test the ability of active disturbance rejection controller with comparison with the existing classical control algorithms.The result proves that:1) The ADRC algorithm can reject the nonlinear disturbance effectively; and 2) Compared with the classical algorithm, it has stronger anti-jamming capability, and higher velocity/LOS stabilization accuracy.