Abstract: As an important part of national security and a matter of sustainable economic and social development in our country, water security is in the process of our modernization drive must address the major strategic issues. Severe water shortage, water pollution, water disaster threat aggravating, serious water ecological degradation and so on is the serious situation of water security in China. Depends on knowledge innovation, technology innovation and institutional innovation, the transformation of scientific and technological achievements on water safety for the practice of building water conservancy, provide strong support for water security of China.