In recent years, due to the continuous rainfall in the rainy season and the influence of local infrastructure construction, several small-scale landslides have been occurred on the shizishuping landslide, which currently threatens 33 households and 156 people, and the village road is about 320 meters, and the factors leading to the deformation of the landslide are analyzed through the site investigation and exploration results. According to the calculation results of landslide stability under different working conditions, the damage process and deformation characteristics of the landslide are simulated and analyzed with the help of PFC^2D software. The results show a phenomenon. The reason why firstly occuring creep-slip deformation, and the deformation gradually increasing by its weight, the stress at the broken foot accumulating abidingly by occurring damage. And the slope is constantly pulled backward, leading to overall sliding. During the movement, the three-stage deformation characteristic of "slip-tension-shear" is presented, i.e. the leading edge slips along the contact surface, tension cracks appear at the top of the slope, and the central locking section shears off. The research results are consistent with the field investigation results, which can provide reference for the prevention and control of the landslide.