The invention provides a follow-up tracking system of a rate gyroscope stabilized platform type antenna, which comprises a direction-finding device, an adjustment link, a PID controller, a PWM driver, a moment motor, an angle measuring potentiometer, an angular rate gyroscope and a differential link. The PWM driver, the moment motor, the angular rate gyroscope and the differential link are connected in sequence to form an angular acceleration negative feedback loop; the PID controller, the PWM driver, the moment motor and the the angular rate gyroscope are connected in sequence to form an angular rate negative feedback loop; the direction-finding device, a preamplifier, the adjustment link and the angular rate negative feedback circuit form an angular position negative feedback loop; the angle measuring potentiometer, the preamplifier, the adjustment link and the angular rate negative feedback loop form an angle searching loop. The follow-up tracking system is an antenna follow-up system which is used for realizing the follow-up tracking technology of stably tracking, searching and isolating the angular motion of a carrier in the direction-finding devices, such as radars, optical imaging, and the like, in moving carriers so as to realize high precision, weak coupling, anti-turn-off performance, fastness and stabilization and realize proportional guidance.