Abstract: Based on analyzing the conditions of landform, strata lithology, geologic structure and underground water, external and internal causes of No.108 landslide occurring were discussed, and the effects of two anti-sliding measures were analyzed. The result shows that eluvial-declivous soils in Quaternary system with a large thickness and low strength is the basic cause of the landslide, the enrichment of underground water, leading to the decrease in the shear strength of slide surfaces, is an important condition of its formation, and slope excavation and rail falling are the direct cause of the landslide. The analysis also indicates that the underground drain tunnel and bored grouting can control the development of a landslide effectively.