Recently, the problem of environment pollution of drink water is becoming more and more serious with the development of economy of China. The safety of drinking water is the important factor concerning the health of our citizen and the economic development in our country. Based on the investigation of the pollution in the research zone, and analysis of river characteristics、hydraulic characteristics and function of river, this paper carried out the range of drink water protected zone with two dimension water quality model, which can be the reference of the other area.