Photocatalytic oxidation of Omethoate with hydrogen peroxide using Ti-containing zeolite (TS-1) as photocatalyst at ultraviolet lamp irradiation had been studied . The effect of the photocatalyst amount, pH, hydrogen peroxide concentration and the radiation time on the degradation ratio of Omethoate were investigated in detail. Kinetics parameters of the photocatalytic oxidation of Omethoate were measured and calculated. The result shows the kinetics of photocatalytic oxidation of Omethoate is fist-order. The activity of photocatalyst was not decreased obviously after reused for five times. Using this photocatalytic oxidation system can effectively reduce the Omethoate content in water. Under experimental conditions, the removal ratio of Omethoate is up to 93%.