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In order to improve the disturbance rejection ability of the airborne radar stabilized platform to satisfy its increasingly high accuracy requirements. The study proposes an active disturbance rejection control (ADRC) based on “first differential, then forecast”. Compared with the traditional ADRC, the disturbance value which estimated by extended state observer (ESO) to compensated the system after “first differential, then forecast” algorithm, which effectively reduces the disturbance estimation delay and significantly improves the real-time performance of the disturbance compensation of the system. The MATLAB simulation experiment shows that the overshoot of the ADRC based on the “first differential, then forecast” control scheme is only 1.11%, and the steady state time is only 0.52s, which is far less than PID control, and its response amplitude to disturbance is only 12.8% of PID control, and compared with PID control, its has the better performances to suppress continuous disturbance.