Based on the analysis of landslide geomorphic,geology tectonic and deformationfailure features,somedisplacement monitoring points and boreholes were arrangedin the landslide surface and in deep level of Hepinggou Landslide of Erlang mountain,and the displacement monitoring information were analyzed and fed back in time.From these data,the influence factors of landslide deformation were researched and the development tendency was predicted.This study result not only hadensured the safety of temporary residents in construction period but provided also basis for landslide regulating scheme design.