The thrust-vectored vertical and/or short take-off and landing(V/STOL) aircraft combines the merits of fast cruise speeds and flexibility, which has attracted much attentions those years. However, the strong coupling and nonlinearity in transition process of the thrust-vectored V/STOL aircraft make it difficult to design the controller. To solve this problem, this paper proposes a method which combines the characteristics of the aircraft and ensures that the horizontal acceleration is maximized while the attitude of the aircraft is controllable. At the same time, the rotation angle of the three-bearing thrust vector nozzle approaches to the target rotation angle, so that the transition process can be completed. Through a series of simulation, the performance of proposed method is verified.