Abstract: There are two main kinds of water fouls induced by POlluhon of water body-biological foul and medicinal foul- This paper intheuces detendnation of all kinds of water body fouls by instrumental analytic and smell detetwation metheds, some deddurizing techniqUes taken in accordance with the different reasons of producing bad smells, such as ozone dedrization, achve drin dwhrization and biological oxidizing dedorizahon. etc, as well as the comprehensive prevention countermeasures of water pollution.