To alleviate the current situation of our country for lack of fresh water， seawater desalination has become a major research direction. According to traditional desalination is high energy-consuming industries， and uses conventional energy， which could easily lead to secondary pollution for environment， a seawater desalination system using non-grid-connected multi-energy collaborative supply is proposed in this article. The system bases on non-grid-connected theory， wind， light， tidal and other green energy is utilized to power seawater desalination system， which can improve the efficiency of energy use and achieve zero emissions of carbon dioxide. The system possesses good social and economic benefits. This paper designs and develops a?set of?single blower?daily?million tons of?seawater desalination system， using a?2.5 MW?wind turbines of this?system?for seawater desalination?and power supply system，?based on the theory of?non-grid-connected wind power，?achieving?high efficiency and low cost，?full?utilization.