Abstract: The integrated flight/thrust control system with constant angle of attack can significantly improve the aircraft maneuverability. It will enable the flight path to respond to the change of attitude speedily and accurately. This paper is to state the philosophy of approach power compensator system (APCS) with constant angle of attack, study its control law and present briefly the design method of parameters. Also evaluated is its performance by comparing it with APCS at constant air speed. The numerical simulation of the APCS for the automatic carrier landing system shows that the analysis presented by this paper is feasible.