An immobilized TiO 2 photocatalyst is choosed to treat phenol dicharge. The authors study the remove efficiencies under different conditions through experiments, such as lamping lights,time that the photocatalyst is lamped,pH of phenol dicharge and so on. It is showed that a satisfactory can be presented in the condition that the photocatalyst is lamped by mercury light and the time that light lamping lasts 5 hours long and pH of phenol dicharge is in 2.0.