Cognitive Navigation is a new method of autonomous navigation for Unmanned Combat Aerial Vehicle, and intelligent real-time path planning is the most important function of Cognitive Navigation for UCAV autonomous flight.The new topic on UCAV intelligent path planning of cognitive navigation is discussed by learning from human brain. Firstly, the research status of UAV real-time path planning is surveyed, and its development trends are summarized. Secondly, in order to obtain higher intelligence and wider adaptability under the complex battlefield with different tasks, the intelligent path planning of cognitive navigation is proposed for the first time, the basic connotation and the complete cognitive cycle are illustrated, and the main functions of the novel technology are illustrated. Finally, some key technologies presented clearly indicate the way to the further research.