By taking 2007TM images and 1∶250 000contour maps of Bazhong City as data sources and using GIS spatial analysis functions,landuse database of Bazhong City is established and the DEM,slope,and terrain niche index chart are produced.Then,slope gradient,elevation gradient,and terrain gradient are respectively overlaid with landuse landscape data.The distribution characteristics of different landuse landscapes at different terrain gradients are discussed by introducing the dimensionless distribution index.Results showed that the forest land mainly distributes in the place with higher elevation,steeper slope,and greater terrain niche.Farmland and rural residential land are located in the place with low altitude,gentle slope,and low terrain niche due to the effects of climatic conditions and water distribution.Unused land is in the vast and distribution trends of the landuse landscapes.