important way to improve the quality of drinking water is of drinking water disinfection.Not currently a disinfectant is completely non-toxic to humans,the disinfectant residual disinfectant by products and water and other substances produced effects on the human body more and more human attention.With the development of detection technologies,applications,new DBPs high sensitivity detection equipment continue to be reported.This paper briefly on the hazards of drinking and detection methods of disinfection by products disinfection by products.