This is a brief introduction of CWO （catalytic wet oxidation） industrial application research in the typical difficult biodegradable pharmaceutical chemical waste water （COD 42300 mg·L^-1, ammonia nitrogen 578 mg·L^-1, B/C 〈 0.2） treatment. The waste water was treated for 90 minutes with catalyst including ruthenium and in the reaction condition of pH 11, temperature 270 ℃ and pressure 9.0 MPa. The effluent meet GB8978-1996 Integrated wastewater discharge standard＇ class I which demands COD ≤ 100 mg/L, ammonia nitrogen ≤ 15mg/L, pH 6-9. Direct running cost is about 1.1-1.5 yuan/kg COD.%简要介绍了CWO（湿式催化氧化法）对某典型难降解医化废水（COD42300mg·L^-1,氨氮578mg·L^-1B／C〈0．2）的工业化应用研究。结果表明：采用含钌催化剂，在原水初始pH调节为11左右，在270℃，9．0MPa压力反应条件下，经90min处理，出水可以达到GB8978-1996《综合污水排放标准》一级排出水要求，即COD≤100mg／L，氨氮≤15mg／L，pH6-9要求。直接运行成本可维持在1.-1.5元/kgCOD。
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