介绍了煤化工难降解废水来源、特点及其现状，分析了零排放政策下煤化工行业废水处理方式，提出煤化工工艺废水应进行多级处理。催化臭氧化法以处理效果好的优势获得关注，对其在煤化工废水处理中的研究进展进行了综述，认为在深入研发催化剂、改善操作条件的同时，应进一步开发以催化臭氧化法为主的联用工艺，以实现该技术的工业化。

This paper introduces the sources,characteristics and status of refractory wastewater from the coal chemical industry and analyzes the concerning treatment methods under zero-emission policy.It puts forward that the wastewater from the coal chemical industry shall be processed in multistage.Catalytic ozonation process attracts a lot of attentions due to high treatment efficiency.The research progress of catalytic ozonation in treatment of coal chemical industrial wastewater is reviewed.It is suggested that combining technologies with catalytic ozonation as the core shall be developed and industrialized when researchers continue to develop catalysts and optimize operating conditions.