Abstract: Continuous and high-accurate vertical deformation of a large area can be obtained with InSAR.The InSAR is an effective technology for monitoring the earth surface deformation caused by some natural disasters,such as earthquake,volcano eruption,and landslide.This paper introduces the application of InSAR on monitoring landslides in loess area in Shanxi province.Firstly,we carried the wild geological investigation and optical interpretation of TM remote sensing images.Then,with D-InSAR processing of EnviSat SAR data,we obtained the interferometric deformation field and the displacement of the study area.Finally,we detailedly analyzed the deformation ranges along Huangcaowan-Dongjiasi line,and plotted four important monitoring areas where great displacement occured.