Abstract: Under the situation of epidemic globalization, the rapid evolution of the world competitive sports pattern and the compression of the Paris Olympic cycle make China's Olympic preparations in a complex and changeable dynamic environment.Based on the perspective of dynamic environment, this paper studies and analyzes the complex situation of China's preparations for the Paris Olympic Games, and conceives strategic plan for Olympic preparations, in order to provide macro vision and theoretical groundwork for China's Olympic preparations. The research shows that under the dynamic environment, China's Olympic preparation presents multidimensional characteristics, such as complexity and unpredictability, opportunity and risk, advantage and disadvantage. The research suggests that we should study and judge the complexity, actively adapt to the changes of the Olympic cycle, and adjust the sports training plan in an orderly manner; understand the unpredictability, strengthen the communication with IOC and continuously enhance the information acquisition mechanism; seize the opportunity, strengthen international talent introduction, and advance the support of science and technology for Olympic preparations; avoid risks, establish and improve the risk prevention and control system, and comprehensively improve the ability of risk prevention and control; exploit the advantages,promote the construction of a new national system, and build a new model for the development of competitive sports; fight against disadvantages, optimize the strategic layout of the Olympic projects, and form a new pattern of coordinated development of competitive sports.