Automatic carrier landing is the enabling technology of unmanned aerial vehicles(UAV)that must be solved before launching.The US military has completed the demonstrated automatic carrier landing test of X-47B UAV in 2013,which laid a good technical foundation for the development of its carrier-based MQ-25A Stingray UAV.By sorting out the differ-ence between land landing and carrier landing system,the general procedure of automatic carrier landing of carrier-based UAV is given.The technical characteristics of automatic carrier landing of carrier-based UAV is analyzed through function role,working range,system architecture,system requirement,implementation approach as well as key technology,et al.which will provide a reference for subsequent research on relevant key technologies and development of weapons and equipment.