In terms of geological structure and deformation characters, Yanbao landslide is a typical lateral rock spreading, and has an integrated progressive deformation process. It is predicted that when the reservoir water level rises to 156m and to 175m, and quick down from 175m to 145m in reservoir operation, Yanbao landslide will occur remarkable deformation and leads to rock blocks sliding and toppling. When water level at 156m, the landslide surge is 4• 10m, which will affect navigation of adjacent area of Changjiang water way.