Photocatalysis technology was used to investigate its removal capability of disinfection by products(DBPs). The photocatalytic degradation rates of different compounds were obviously larger than those in photolytic degradation. They were 3～7 times for halogenated alkyls and 2～3 times for alkenes and aromatic compounds. Investigation of photocatalytic degradation orderliness show that cinnamene > o-cresol>alkenes >alkyls.
