Benzene is a volatile organic compound commonly found in the atmosphere. It may dissolve in water droplets, clouds and other aqueous phases. Under the irradiation of sunlight, it can undergo photooxidation reaction with the hydrogen peroxide in the aqueous phase. OH-initiated aqueous photooxidation of benzene is studied by a home-made aqueous reaction apparatus. The molecular functional groups of aqueous reaction products are measured by a Fourier transform attenuated total reflectance infrared spectrometer. The chemical components of the products are analyzed qualitatively. The experimental results show that in the absence of hydrogen peroxide, the infrared spectrum of the benzene solution after 3 hours of irradiation contains the stretching vibration absorption peaks of C-H and C=C of benzene ring. There are only benzene organic compounds in the solution, and no new product is produced. When the mixed solution of benzene and hydrogen peroxide is irradiated with ultraviolet light for 3 hours, the infrared spectrum of the reaction product solution not only has the stretching vibration absorption peaks of C-H and C=C of benzene ring , but also contains the stretching vibration absorption peaks of O-H and C-O-C bonds. These results show that OH-initiated aqueous photooxidation of benzene can form phenolic compounds and aromatic ether products. This provides experimental evidence for the study of aqueous photooxidation mechanism of benzene.