Abstract: Dimensionally stable anodes (DSA)-type anodes,made by the authors themselves with special technology, have been employed in electrochemical catalytic system,one of the newly developed advanced oxidation technologies/processes(AOT/P),to treat the nitrobenzene wastewater.The optimal condition has been obtained in this study range.The analysis shows that the reaction can be described by first-order kinetics.It is inferred that nitrobenzene molecules will be mainly reduced by H· produced on the cathodes firstly to form nitrosobenzene and aniline,etc.,which diffuse to the anodes to be oxidized by HO· absorbed on the anodes surface to give azobenzene and azoxybenzene,etc.and at last the benzene rings will be opened to produce acid and carbon dioxide.The analyses also imply that nitrobenzene molecules can be oxidized around the anodes directly to form 2-nitrophenol.Finlly,the degradationpathways of nitrobenzene have been illustrated.