The application of cognitive theory in Unmanned Combat Aerial Vehicles (UCAV) Intelligent navigation is studied profoundly. The latest trend of cognitive theory application research at home and abroad is summarized. Then, the present researches of UCAV Intelligent navigation are introduced in three aspects of navigation method, path planning and autonomous landing. Based on analyzing these recent researches, a new technology of cognitive navigation developed from integrated navigation is proposed, and furthermore, the basic connotation and main functions of the cognitive navigation are illustrated respectively. Finally, the characteristics of the cognitive navigation are shown in detail, which clearly show the way to the further research.