Abstract: According to the ecological security and environmental protection, the paper discusses the combination of resilience concept and space environment elements. From the aspect of urban resilience and the disaster adaptation, with the public space system of mountainous city as research object, the paper summarizes the basic characteristics and design principles of urban public space, then puts forward the design strategies from the aspects of land optimal utilization, landscape ecology protection, green transport and ecological disaster prevention. It dedicates to the optimized ecological security patterns of mountainous landscape and the sustainable development of mountainous city.