Aiming at the nonlinearity, strong coupling and Low control efficiency of rudder surface of UAV maneuvering flight, the backstepping control method is used to design the maneuvering flight control law of UAV. At the same time, in order to solve the problem of rudder surface angle rate saturation caused by the low control efficiency of the rudder surface, the control law of the rudder layer is designed to weaken the influence of the rudder surface angle rate saturation. The mechanism of the control law overcoming the influence of the angular rate saturation of the rudder is analyzed in this paper, and Lyapunov stability theorem is used to analyze the stability of the controller. The simulation results show that the control method designed in this paper enables the UAV to obtain a maneuver effect similar to that of the vector control, and effectively solves the influence of the rudder surface angle rate saturation during the maneuvering flight.