| Jiangxi Province is located in the south of the Yangtze River, it belongs to a wetter region. Landslides is frequent in rainy season, natural slope landslides account for a fairly large proportion, the disaster of landslides is also very serious. So it is very necessary to study on natural slope stability under the rainfall infiltration conditions. In this paper I have done some work in the following:(1) From the rainfall overall characteristics of Jiangxi Province, the rainstorm characteristics, rainfall divisions, temporal and spatial distribution of heavy rain, a typical rain type statistics of storm center aspects, rainfall characteristics of Jiangxi were analyzed.(2) From the topography, slope landslide developmental, natural Slope geometric characteristics of the Jiangxi were analyzed; From the geological structure, geotechnical body composition, distribution of the natural slope geotechnical aspects, the characteristics of geotechnical of Jiangxi natural slope were analyzed; the impact factors of Jiangxi natural slope instability were analyzed; the basic characteristics of Jiangxi natural slope instability were summarized; the relationship between rainfall and Jiangxi natural slope instability were statistically analyzed.(3)On the basis of introducing geological environment, the landslide characteristics of typical landslide - the Hejiadong landslide, the physical and mechanical parameters of were statistically analyzed, and its influencing factors were analyzed.(4) The saturation - unsaturated seepage field of Hejiadong landslide on rainfall conditions was analyzed, the slope stability under the conditions of rainfall was analyzed. on the basis of introducing the principle of reliability analysis, the reliability of slope was analyzed, the parameter sensitivity of soil bulk density, effective cohesion and effective internal friction angle was analyzed.
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