Abstract: This article deals with geological environment, scale and characteristics of the filling section landslide on Shipa channel of the right main canal for Shengzhong Reservoir, analyses how the leakage affects C、 values of the silty mudstone, discusses the causes for occurrence of landslide on water diversion filling channel lateritic hilly zone, calculates the influence of pore water pressure and seepage force on stability of filling canal bank and introduces anti leakage measures in the studied area so as to provide a reference for similar projects.