In order to improve flight safety in dangerous weather, reduce the workload of the controller’s radar guidance around the dangerous weather area, and optimize the aircraft's diversion path in dangerous weather, a coded airspace information matrix was built and a rasterized method was used to represent the danger Weather area, define the moving direction and speed of the dangerous weather area, and clarify the safety threat of the dangerous weather area in the area to the air route; and then, for the impact of the moving dangerous weather area on the air route in the airspace, a real-time method based on the improved artificial potential field method is proposed. The dynamic diversion strategy allows flights to bypass the dynamic dangerous weather area as soon as possible, thereby ensuring the utilization rate in the airspace. The results show that the real-time dynamic diversion strategy based on the improved artificial potential field method can complete the task of selecting the optimal route in a dynamic environment, plan and select a route quickly and efficiently, and change accordingly with the change of the environment,with certain stability and strong adaptability.