Abstract: The treatment of geological hazards such as landslide has all sorts of difficulties and urgency. There are kinds of deficiencies in the previous treatment methods. The high polymer material, which has been widely used in geotechnical engineering, possesses the merits of high strength, light weight, high expansibility, short setting time, good durability, easy construction and is water-proof and harmless to the existing structures. Through analysis, it is found that the polymer grouting reinforcement technology can handle all kinds of unfavorable conditions in the treatment of landslide well. Therefore, the polymer grouting reinforcement technology for the treatment of landslide is put forward innovatively in this paper. The slope deformation and stability before and after reinforcement with polymer grouting were studied by finite element method. The results indicates that the polymer grouting can deepen the slip circle and increase the sliding path, as a result, it avoids the shallow sliding mode of slope, which leads to the increase of stability and the decrease of slope deformation. After reinforcement, the factor of safety is increased by 38%,the maximum total displacement is reduced by 29% around. Hence, the effectiveness of polymer grouting reinforcement technology is preliminarily verified.