Abstract: Taking a limestone mine in Guangxi Autonomous Region as an example, this paper introduces the basic idea, analyzing method and preventing countermeasures to the geo-environmental impact of the mine. On the basis of understanding the fundamental state and finding out the mining geo-environmental problems, combining with the features of auxiliary projects and engineering activities, the geo-environmental situation of the mine is assessed and predicted, in terms of geological disasters, aquifer breakage, landforms and land resources devastation. The assessed area is divided into three sub-areas:primary area, secondary area and ordinary area. Correspondingly, the preventing and controlling measures to the geo-environmental problems are put forward for different auxiliary projects.