Abstract: A surveying method for landslide monitoring using GPS is introduced. Through the experiment of landslide monitoring with GPS in Xiakou, Ya'an County, Sichuan Province, the authors elucidate the selection of the sites of monitoring stations, lay-out of the monitoring baseline network and method of GPC data processing when GPS monitoring of a landslide is conducted in a mountainous area where the topography is complex and the observation conditions are harsh. The results of the experiment show that GPS landslide monitoring can reach an accuracy of mm scale and can fully meet the demands of landslide monitoring.