Jiare landslide is located in Jiaxue Township of Seda County in Ganzi Prefecture and it is a typical traction landslide with average slope of the landslide body about 35°, it is mainly composed of gravel soil. The landslide is about 195m in length, 280m in width and 15m in average thickness. The total mass of the landslide body is about 600,000m3, which is a medium-sized landslide. At present, the deformation of the upper and middle parts of the landslide mass is obvious. Once the landslide occurs, it will directly threaten the safety of the life and property of 160 people in 41 local families. Based on the field geological survey, this paper makes a qualitative analysis on the deformation and failure mechanism of the landslide body and makes a quantitative analysis by using 3-dimensional finite element numerical simulation, which is of great significance for the study on the stability of the same kind of landslide.