Abstract: Under the background that Suzhou is going to explore the ecologically sensitive areas along the Taihu Lake in the south， we took Guangfu Town， Wuzhong District， Suzhou City for example and built up the ecological sensitivity evaluation system by combining theoretical analysis and frequency analysis with AHP. It was concluded that its ecological sensitivity level was extremely high， water source protection areas and nature reserves were extremely sensitive， the possibility of encountering water， droughts and other disasters and historical sites were highly sensitive， and that important shoreline protection zone， cultivation in the freshwater and mineral resource development were moderately sensitive. In the future， it is necessary to protect these ecologically sensitive areas and sensitive factors based on their sensitivity level according to the spatial heterogeneity of ecosystem services law so as to achieve regional ecological environmental protection and sustainable resource development in the harmony and sustainability.

Key words: ecologically sensitive areas, ecological sensitivity evaluation, water source, nature reserve