Basing on geological model of Hefeng landslide and using finite difference method to analyze the interaction of landside mass and retaining wall under condition of reservoir water

we can get satisfying results. Under the condition of reservoir water

the results show: ①Local tensile stress appears in the wall heel of retaining wall; ②The increment of shearing strain process developed (">"development mode) from backwall to metope along retaining wall and "weak contact face" in stone head; ③The landside mass and retaining wall have same deformation tendency

and the upper deformation is larger than the under-part; The isolines of displacement are parallel to each other

and the retaining wall is bedded destroyed because of shallow landslide; ④The landslide is shallow slippage

and the stability of landside and retaining wall go down. In the end

the paper points out that drift index can be used to evaluate anti-slide stability and anti-tipping stability and determine critical width of retaining wall under the conditions of reservoir water; and then the stability of landslide and retaining wall can be improved for the optimization design of retaining wall. All of these will provide theoretical guiding for geologic hazard control and engineering design.