To reduce the content of nitrobenzene in wastewater, an air stripping-O₃/H₂O₂ oxidation treatment process enhanced by high gravity technology was established for the first time. The pretreatment of high concentration nitrobenzene-containing wastewater was conducted by air stripping method, which was enhanced by high gravity technology. The effects of high gravity factor β, gas-flow rate G, liquid-flow rate L and stripping times on the nitrobenzene stripping efficiency were investigated. The experimental results show that the combination of high gravity technology can effectively improve the nitrobenzene removal rate. When the G=20 m³·h^-1, L=20 L·h^-1, β=80, the concentration of nitrobenzene after stripping for 10 times is decreased to 100 mg·L^-1. Then the changes of stripping efficiency are significantly weakened. The lower content wastewater is further treated by advanced oxidation process of O₃/H₂O₂ enhanced by high gravity technology. When L=120 L·h^-1, β=80, gas phase O₃ concentration C_O3=50 mg·L^-1, the concentration of H₂O₂ C_H2O2=4.9 mmol·L^-1, initial pH=10.5 and the processing time is 25 min, the removal efficiency of nitrobenzene can reach 99.6% and BOD₅/COD_Cr=0.38; the wastewater treated can meet the standard of biochemistry treatment of integrated wastewater discharge standard(GB8978-1996).