Based on the theory of complex adaptive system (CAS theory), this paper tries to construct the coordinated and interactive development framework of "tourism industry-ecological environment", and takes Hechi, Guangxi as the research object, to explore the course, effectiveness, problems and promotion strategies of the transformation and upgrading of local tourism industry and the optimization of ecological environment. The research holds that the industry should constantly improve the industrial structure, expand the industrial function, and realize the improvement of the quality and efficiency of the tourism industry. In the ecological aspect, we should expand the dimension of governance, improve the efficiency of governance, and continuously consolidate the foundation of the ecotourism industry. At the same time, we should pay attention to the intervention and coordination of various forces in the process of interaction, and actively guide the benign interactive development of the tourism industry and the ecological environment.