Abstract: There are four karst combination morphology like ridge-hilllock-valley-middle mountain,ridge-spinal-valley-low-middle mountain,karst-conyon-middle mountain,solution platform-valley-low mountain in this area.Karst caverns are distributed mainly in the Reach of Juandong River and Baoluan River、main stream of Wujiang River and Yangtze River.Karst development and distribution are influenced by many factors:carbonate lithology combination is the base,and regional structure and neoteetonics are influencing factors.