Abstract: By the east, middle and west routes, South-to-North Water Transfer Projects (SNWTP) connects Yangtze River, Yellow River, Huai River and Hai River together and forms a huge integrated water network which is conducive to achieve rational allocation of water resources from south to north and from west to east. With covering most population and economic zone of China, the network takes full advantages of the multi-source water supply and fundamentally relieves the water shortage in the North of China, to enhance the national population carry capacity. It will support national sustainable development significantly and greatly.