Tbis paper introduces how to survey Maojiazhuang landslide and analyseit’s stability with remote sensing techniques.Maojiazhuang landslide

located in Gan-su Province

China

is an old and a very large landslide. We can find the landslideon the fracture zone by interpreting satellite image and delineate it’s extent clearlyon aerial photos.At the front of the landslide a quarry has been build.At present

there appear many active phenomena within the old landslide area. They indicate the landslide will slide down.