Abstract: This paper studies the stability of the landslide from K160+840 to K161+020 in the No.316 National Highway in detail, analyzes its plane characteristic and sectional structure characteristic, as well as the cause leading to the landslide. And the quantitative numerical analysis is also discussed by using residual thrust transferring method, as the resalt, the safety of factor is 1.053, it shows that the landslide is in a critical steady state.