Environmental effects of land use /cover change will become a focus in this research field in the future.Based on remote sensing images of Xitiaoxi Catchment in1985,1995and2000,land use /cover change map and land use matrix were made.This paper analyzes the tem-poral - spatial regulation of land use /cover change during the15years followed by the analysis of the corresponding relationship s between the land use /cover change and landscape ecology.The results are as follows.First,the area of arable land decreased continuously while the settlement area expanded all the time.The woodland area increased slowly after a period of going down.Second,the variation trends of landscape structure and landscape heterogeneity are patch frag-menting,shape of patch becoming regular and types of landscape simplifying.Third,the land use /cover change of Xitiaoxi Catchment has caused distinct landscape effects,such as environ-ment al quality declining,edge effects intensification,land degradation and landscape elements reducing.Finally,the paper suggests that land use manners should be improved in landscape scale so as to rehabilitate and reconstruct landscape ecosystems in Xitiaoxi Catchment.