This paper based on the investigation of actual distortion and damage of the low-angle dip bedding slope, such as the characteristics of the shape and deformation, the structure and matter constituent for the landslide in a southwest hydropower station, reappeaed the part process of deformation failure by choosing theⅡ-Ⅱ′ main section of the landslide and using basa contact friction expriment in the physical simulation method , synthetically analyzed the deformation of different phases and the final failure mechanism, and eventually confirmed that the landslide is belong to sliding-compression cracking. At the same time, according to the comparison of the research findings of the physical simulation method with the outcomes of 3DEC distinct element analysis and landslide stability analysis and with the actual distortion and damage of the landslide, this paper still adequately demonstrated the feasibility of the physical simulation method.