The paper took typical amino sugars D - (+) - glucose amine as the research object,used the chlorine disinfection to explore whether the D - (+) - glucosamine is the precursor of halogenated carbon and nitrogenous disinfection byproducts trihalogenated methane (THMs) and trichloronitromethane(TCNM),and cleared the formation potential of THMs and tcnm and studied the influence of adding amount of chlorine, pH value, the concentration of bromide ion, nitrate ion concentration on the formation potential. The results show that the D - (+) - glucosamine is the main precursors of THMs and THMs.Chloroform is the major THMs species in the process of chlorine disinfection. To Increase the investment, the generating potential of TCNM and HNMs will increase;with the increase of pH, formation potentiall,the formation potential of THMs will first increase and then decrease; with the increase of concentration of bromide ion and nitrite ion, the formation potential of THMs will first increase and then decrease.The formation potential of THMs under the concentration of high bromine ion and high sub nitrate ion showed suppressed trend.