The invention provides a method for realizing automatic control for a tracking antenna by using the received signal level. The method comprises the steps of 1) acquiring received signal level data of the tracking antenna; 2) sampling the received signal level data, carrying out direction judgment according to a sampling value, rotating an azimuth motor to drive the tracking antenna to carry out operation search, and terminating the search if the received signal strength reaches a set range; if not, terminating azimuth angle search, enabling the antenna to point to a track starting position, and getting into a step 3); and 3) carrying out direction judgment according to the sampling value, rotating a pitching motor to drive the tracking antenna to carry out operation search until the received signal strength reaches the set range, terminating the pitching angle search and turning to the step 2) until the antenna tracking process is over. The advantages lie in that searching and tracking can be carried out on a moving target according to the received signal level when the tracking antenna cannot receive positioning information of the moving target.