This paper presents a flight control scheme for the aircraft with thrust vectoring to perform the pitch maneuver at high angle of attack under unsteady aerodynamic condition. The scheme employs a disturbance observer to estimate the unsteady aerodynamic disturbances emerging in maneuvers. Complete pitching moment compensation and proper lift amendment are added to the control signals. In order to design the nominal controller and the disturbance observer, linear parameter varying (LPV) models of the aircraft and external disturbances with identical scheduling parameters are established. Maneuvers simulations show that the proposed method has excellent track to the command and effective rejection to the unsteady aerodynamic disturbance.