Abstract: With the aid of the RS and GIS technology and remote-sensing information,a thematic series of nature conservation maps were plotted out.By overlaying the series of maps with the planned expressway network map for buffer analysis and statistical analysis,impacts of the planned expressway network on eco-environment were studied.Among the planned 5 vertical,9 horizontal and 6 linking expressways,9 will have certain impacts on 9 of the 127 different nature reserves,and among the 11 across the Yangtze River,5 will affect the drinking water reserves along the Yangtze River.About 76.74% of the land that is to be occupied by the planned expressways will be basic farmland.The expressways striding over the Taihu Lake will aggravate eutrophication of the Meiliang Bay and Wuli Lake.In response to the above-listed problems,six important strategies are proposed with a view of protecting the eco-environment.

Key words: Jiangsu Province, planned expressway network, eco-environmental impact