Unsaturated hydraulic parameters are very important for calculating rainfall infiltration process and stability of landslides. Double rings infiltration tests are conducted on Huangtupo landslide in Three Gorges reservoir area to obtain the saturated hydraulic conductivities of the shallow soil deposits of the landslide. The water content and matric suction of the shallow soil deposits of the landslide are monitored using real-time monitoring system; and a large amount of data is gotten. The soil-water characteristic curves and their fitting parameters are simulated with the van Genuchten’s three-parameter model for the soil-water characteristic curve. Substituting the saturated hydraulic conductivities and the fitting parameters into van Genuchten’s hydraulic conductivity model yields the hydraulic conductivity function of the shallow soil deposits of Huangtupo landslide under unsaturated condition. Therefore

the hydraulic parameters for calculating stability of Huangtupo landslide under rainfall effect are obtained.