The fragile ecosystem in karst rock desertification area restricts heavily socioeconomic development. In order to strengthen and consolidate the management achievement, the problem of coupling the ecologic system with economic system should be considered. In this paper, the Yangchangdong management demonstration area in Qingzhen city is taken as an example to analyze the processes, the ways and the mechanisms of eco-economic system coupling in karst rocky desertification according to eco-economy theory and system theory through field trips and door-to-door interviews. The study find that it enables effective coupling of the eco-agricultural system with the community tourist system by means of taking rocky desertification control as start point, putting tourist development into the rocky desertification control project, considering the rocky desertification control projects as tourist landscape resources, developing both resources in the eco-agricultural system and the community tourist system. After the coupling of the system, the following powerful system function and positive effect can be made: consolidation of the achievements for rocky desertification control project and increase of resident income in the community as well as efficient use of resources.