With poor management,Beijing's thousands of car-washing sites use up to tens of millions of tons of water each year,further endangering water supply and water security. This paper,by studying relevant literature and conducting field researches,exposes the ostentatious water use of car washing in Beijing,as well as its impact on resources,the environment and ecology. With China endeavoring to foster conservation culture and build a water-conserving society by "promoting the reduction,recycling and reclamation in production,circulation and consumption",both affirmative and constraining initiatives shall be taken to strengthen monitoring and encourage the use of reclaimed water in car washing,so as to contribute to the development of conservation culture in Beijing. <<