Electrocatalysis-oxidative degradation of Azo-Dye ( methyl orange) has been studied with ternary oxide anodes made with SnO_2 carried by active carbon. Various influence factors such as applied voltage 、 initial PH and operational temperature are examined. 采用活性碳负载SnO2的半导体电极电催化氧化偶氮染料废水,研究了负载电压、pH值、温度等因素对甲基橙去除率的影响,确定了适宜的反应条件。