Abstract: Based on a case study of Shiwagou landslide, which is located in Liubei Town, Yun county, Shiyan city, the space shape, composition and structure characters, and hydrological geology characters are discussed in detail. The formation mechanism of swelling soil landslide is analyzied, and the composite analysis and prediction evaluation of landslide stability is given by computing. As for the characteristic of Shiwagou landslide, the composite prevention measure of geogrid and drainage project is presented.