As to the problem of tracking the glide trajectory of a UAV during net recoveryan innerloop controller combining reaching law based sliding mode control with optimal control was designed on the basis of the outer loop controller with αβ filter.The stability and dynamic performance of the system were improved.Taking a small UAV as an examplewe made a threedimensional digital simulation to the whole netrecovery process.The simulation results show that this controller can realize accurate control of the attitude and trajectory of the UAV during its landingand realize netrecovery accurately even when the deck is in movement.