Abstract: This paper takes the slope of Yaoshan Village in Anxi County as an example. Through visiting surveys, engineering surveys and professional monitoring, it identifies the study area topography and lithology, the characteristics of the groundwater pipe network seepage system, the deformation and failure modes of the slope. It uses FEFLOW software to construct groundwater seepage model in the study area, explores the variation law of groundwater seepage field with different rain intensity, and utilizes FLAC strength reduction method to calculate the sliding surface depth of slope and its safety factor. The results show the follows. The slope not only exhibits the characteristics of tensile cracking deformation and failure, but also features such as ground subsidence and ground collapse. Under the rain conditions of 165.5 mm·m^-1 and 317.7 mm·m^-1, the groundwater level increases by 0.5~1.5 m and 0.5~2.5 m respectively, compared with the natural conditions. The depth of the sliding surface is 9~12 m, and the safety factor is 1.04 and 0.97. It is consistent with the site investigation and monitoring results. Based on this, it is recommended to adopt "blind drainage ditch blind pipe+intercepting drainage ditch" as the main engineering treatment measure.