Yongxin County is located in the high geological disaster prone area in Jiangxi Province. The type of geological disasters are mainly classified into landslide， collapse， debris flow， ground collapse and so on. Based on the geological environment conditions in the area， through the comprehensive study of 370 geological disasters which occurred over the years， the development law of geological disasters in Yongxin County is summarized. The various geological disaster-breeding environment was analyzed， and the disaster-breeding factors such as topography and engineering geological rock groups related to the development of geological disasters and their effects were studied. The results show that the disaster-breeding environment is controlled and influenced by the topography， engineering geological rock group， slope structure， geological structure， rainfall and human engineering activities. Taking full account of the disaster-breeding environment in the area， with the engineering geological rock group and topography as the main control factors， the disaster-breeding environment of Yongxin County is divided into 3 large areas and 19 sub-areas， which provides technical support for the risk assessment of fine geological disaster investigation and scientific basis for the precise prevention and control of geological disasters.