The GPS technology has many advantages such as round-the-clock,roboticized,liberty in selecting points,and capable of providing three-dimensional coordinates,so it provides a new and effective data collection method for landslide monitoring.The author mainly research the method of GPS technology used in landslide monitoring and give the all process according to researching landslide monitoring of Kaziwan landslide in Sanxia area,including technology design of monitoring network,field survey,data processing and deformation analysis.The results indicated that GPS static positioning technology reached the precision of mini-meter and fully meet the requirements of high-precision deformation monitoring.