The research on the change of ecological environment with remote sensing is one of the important parts of the research on global change. Being crossed three provinces, the "Shan-Gan-Ning air mass to Yinchuan" natural gas pipeline project region is characterized by the obvious variety, complexity and transition of geographical environment. By using the TM images in 1997,2001 and the spatial analysis methods of remote sensing and investigated by quadrat,the dynamic change of vegetation,land use and soil erosion in the "Shan-Gan-Ning air mass to Yinchuan" natural gas pipeline project region during the period from 1997 to 2001 are analyzed. The results show that only by timely and aptly ecology restoration, the environment influence of pipeline project might be minimized.