Abstract: A detailed investigation was carried out on the structures and karst caves in Luotuo Mountain, with the 1:2000 geological survey focusing on their distribution characteristics. Through comprehensive study on the relationship between formation of karst caves and structures, the paper discusses the forming conditions of karst caves from the aspects of corrosion and erosion, as well as collapse and accumulation, infers the formation age of karst cave accumulation according to the elevation comparison of karst caves, and summarizes the formation rule of karst caves, which provides basic geological data for further study on evolution law of the Quaternary mammals.