Abstract: The wastewater from a hazardous waste disposal plant was treated by "Fenton/Hydrolytic Acidification/Contact Oxidation/MBR" process.The design parameters and debugging of the treatment process were introduced.Its application showed that the wastewater treatment handicraft operation was stable.The effluent could meet the discharge standard.The average chemical oxygen demand concentration in effluent was 30.6 mg/L.The average ammonia concentration in effluent was 1.28 mg/L.The average total nitrogen concentration in effluent was 0.32 mg/L.the experience in debugging and operation finally were summarized.