Abstract: In order to optimize air combat tactics efficiently and improve the win rate of UAV air combat, air combat situation analysis and tactics optimization methods are proposed. Firstly, based on STPA method, the UAV air combat confrontation process is modeled to identify system level hazards that may lead to UAV mission failure. Then, according to the air combat maneuver control process, unsafe behaviors and system factors that cause system level hazards are analyzed, and tactical and technical optimization measures are formulated. The UAV air combat confrontation verification platform is designed to quickly verify the effectiveness of the optimization measures, and the effectiveness of the optimization measures can be judged by the final win-lose ratio index.The optimal maneuvering distance and relative angle is selected as tactical optimization objects to verify the effectiveness of air combat situation analysis and tactical optimization.By drawing the win-lose ratio envelope curve, the best combination of maneuver distance and relative angle can be finally selected to maximize the win-lose ratio.