With the methods of investigation and water quality sample analyzing, index of ecological，economis and social benefit were monitored and evaluated in eco-clean small watersheds of Facheng, Jiuyuan,Lingjiao, Tanchang and Qinglongjian. The results show that the construction of clean small watersheds can improve the ecological environment and water quality of the bigger watersheds or the local area. Meanwhile,the clean small watersheds provide human with high quality water, favorable living and vacation place, which can improve local agricultural productive condition and optimize the industrial structure.