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以河源市城南生活污水处理厂为平台，研究了A^20-人工湿地组合工艺对污水中油类物质的去除效果。结果表明：经过A^20-人工湿地组合工艺处理后，污水中油类物质的去除可达96．5％以上，出水水质基本达GB8978-1996《污水综合排放标准》中的二类污染物一级排放标准；同时探讨了该组合工艺对城市含油污水的净化机制以及系统运行的限制性因素，系统内部油类物质被降解和去除的过程，确立可推广应用的A^20-人工湿地组合工艺对含油废水的深度处理系统。“,”Heyuan,South Sewage Treatment Plant was taken as a platform to study removal efficiency of oily pollutants from wastewater by the A^20-constructed wetland combined system. The results showed that the removal rate of oily pollutants reached above 96.5% by this combined process, and water quality was up to the first-order of the second class pollutants emission standards on ＂Integrated Wastewater Discharge Standard＂（ GB 8978-1996）. The paper also discussed the process of urban sewage purification mechanism and the running limiting factors of the system. The oil material degradation and removal process of the system also were studied. The A^20-constructed wetland combination process will be promoted as the one for advanced treatment of oily wastewater.