According to the Water Pollution Prevention Law of the People's Republic of China and Technical Guideline for Delineating Source Water Protection Areas (HJ/T338-2007), scientific and reasonable dividing of the drinking water sources protection zone is the fundamental work of the water resource synthetical developing, reasonable utilizing, active protecting and scientific managing. In addition, it is the ultimate guarantee of consolidating water resource management using legal, administrative and economic methods, and the important steps of preventing water pollution and protecting water resource. Division of drinking water sources protection zone relates to economy and society development, human activity affection, quantity and quality of surface and ground water, land hydrology, engineering geology hydrology, water conservancy and circumstance protection. This technology can provide scientific accordance for reasonable developing, protecting and utilizing the surface and ground water, in order to ensure the safety of water supplying, zoology and environment.