Abstract: based on a height-increasing and capacity-expansive dumping site project, rock mass physical and mechanical parameters was determined through on-site exploration. This thesis analyzes the displacement of dumping site, earth stress, plastic strain and judges the failure model of dumping landslide with the help of finite element. The height of slope dumping site and the slope angle sensitivity analysis are then confirmed based on the previous analysis. This author finally puts forward the operational scheme that dumping slope height is no more than 725 m and the slope toe is11° , so as to achieve the slope stability risk control.