Abstract: The study of multi-aircraft collaborative trajectory planning under complex meteorological environments faces difficulties in cooperative support, frequent weather updates, and the timeliness of trajectory optimization. This paper summarizes the meteorological monitoring technologies, cooperative support methods, and conflict avoidance strategies commonly used in both military and civil aviation. An improved A* trajectory search algorithm is designed in rapidly changing storm conditions to achieve efficient and safe trajectory search objectives. The effectiveness of the algorithm is verified through simulations. Furthermore, a multi-aircraft cooperative trajectory generation system is designed for complex weather environments, based on meteorological moving scenarios and mission priorities. The paper also discusses future research trends and directions for trajectory planning methods in complex meteorological environments.