For further improving landing precision, aiming at the landing control at situation such as ship wake disturbance, parameter uncertainty, and non-linear disturbance, design L1 adaptive augmentation controller. The controller has piecewise continuous adaptive law to compensate bad influence of ship wake disturbance and uncertainty in ship longitudinal inner loop. Use it in carrier-based aircraft automatic landing longitudinal control system, the simulation results show that L1 adaptive controller can deal with system uncertainties, restrain steady ship wake, and realize automatic lading trajectory precise tracking control.