The terrain is the important influence factor in landscape diversity of structure and special patterns; furthermore, the terrain character usually becomes the determinant of great criterion in region distribution pattern. Through overlaying land use map and the DEM-based slope, aspect and elevation map, landscape index under different terrain units were obtained, and the author realized the contradistinctive evaluation of land use in different units. The studies indicated that the distribution of landscape pattern was relevant to elevation, slope and aspect. The risk of soil erosion in the overall study area was in medium level.