Soil erosion under different elevation was analyzed by using remote sensing and geographical information system technologies.It is shown that the maximum of percentage of water erosion above light and water soil erosion index are 49.2% and 180 respectively, it takes place in the region with the altitude between 1000 and 3500 meters. The maximum of the wind erosion index and soil erosion integrative index are 599 and 367 respectively, takes place in the region with the altitude between 1000 and 3500 meters. The maximum of frozen soil erosion index, 218, in the region with altitude above 5000 meters. The water erosion dominates in the region with altitude under 1000 meters. The Water erosion and wind soil erosion dominate in the region with altitude between 1000 and 3500 meter. The frozen soil erosion dominates in the region with altitude above 3500 meters.