Naqu-Changdu highway line is located in north part of South-eastern Tibet Great Turner with EW direction,a great deal of landslide,collapses and debris flow deposits distribute due to extensive tectonic movements and frequent earthquake activties.All of these deposits are hazardous to reconst ruction and transportation of highway.Some new landslide,collapse,and debris flow disasters are tiggered by unreasonable cutting and digging activities.The main disastertypes in highway is intermitted collapse type landslide,multi-graded pulling type landslide,rainstorm debris flow,landslide type debris flow and glacial lake outbursttype debris flow.