The invention provides a system for automatically controlling a tracking antenna. The system includes an antenna (1), an antenna positioning device (2), a data processing module (3) and a control turntable (4); the antenna is used for tracking a moving target, receiving positioning information and signal level data, sending the positioning information and the signal level data to the data processing module (3), wherein the positioning information is sent by the moving target through a wireless link; the antenna positioning device (2) is used for positioning the antenna (1) and transmitting the positioning information of the antenna (1) to the data processing module (3); the data processing module (3) is used for selecting a corresponding data processing unit according to received data states and outputting the result of the data processing unit to the control turntable (4); and the control turntable (4) comprises an azimuth motor (401) and a pitching motor (402) and is used for controlling and adjusting the antenna (1) to make the antenna point to the moving target.