style="MARGIN: 0cm 0cm 0pt" class=MsoNormal>///This paper introduced thoroughly the geological disaster of space prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:PlaceName w:st="on">Stelesst1:PlaceName> <st1:PlaceType w:st="on">Forestst1:PlaceType> in <st1:place w:st="on"><st1:PlaceName w:st="on">Lanzhoust1:PlaceName> <st1:PlaceType w:st="on">Cityst1:PlaceType>st1:place>, analyzed its formation in detail and calculates stability of the landslide. Depending on stability analysis of the landslide, it put forward the comprehensive controlling plan of drainage, retaining, ground treatment.