To solve the problems of strong uncertainty, nonlinearity of high maneuvers in full flight envelope and control surface′s efficie ncy varieties in battle damage or surface failures in UAV combat, a robust adaptive control law which contains a basic controller and a compensation controller is presented. The basic controller is designed by using robustness servomechanism LQR meth od, and on the basis of L1 adaptive method, the compensation controller is constructed. The robust adaptive controller can ensure the stabilization, the dynamic performance and the robustness of UAV control system. Simulation results show the effectiveness and the advantage of the proposed method.