According to the stabilization of airborne electro-optical tracking and pointing system, the technical characteristics of the whole gyro stabilization and the semi-strapdown stabilization are analyzed and compared, and the principle of the semi-strapdown stabilization is described. According to the expression of the inertia-space angular velocity of the tracking and pointing frame under semi-strapdown stabilization, the main factors influencing the semi-strapdown stabilization are analyzed. The Butterworth second-order low-pass filter has been designed to decrease gyro noise. The mathematics model of the controlled object is built by frequency characteristic analysis and error prognosis methods. The pre-control part has been designed to correct encoder error and gyro data delay. And the simulation analysis performed. Experimental researches have been conducted by the prototype, and the results indicate that the stabilization precision of the semi-strapdown system can match that of the whole gyro stabilization system, which has stronger engineering application.