Abstract: With continuous development of economy and science and technology，water conservancy project construction has made breakthrough progress in China.Construction of water conservancy project is conducive to further development of regional agriculture，also could reduce adverse impact of natural disasters to people，and has played an important role on agricultural economy.Construction of water conservancy project is significant，but water conservancy project is prone to water pollution during water dispatching period.Accidental water pollution contingency strategies of water project during water dispatching period were discussed and analyzed.