以OCDF和12378-PeCDF为例，探究了海绵铁脱氯还原降解二英的方法。对比了超声、海绵铁＋超声、海绵铁／银＋超声三种处理二英的实验方法，并对海绵铁／银＋超声处理方法中二英浓度、海绵铁投加量以及超声时间等条件进行了优化，探索海绵铁处理二英的方法。实验结果表明，在海绵铁／银＋超声的体系条件下还不能脱氯还原降解二英，还需要做进一步深入的探究。“,”This paper,taking OCDF and 1 2378-PeCDF as example,explores the sponge iron reduction degrada-tion dioxin de-chlorination method as well as a comparison of ultrasound,sponge iron+ultrasound,sponge iron/Ag+ultrasonic three treatments dioxin experimental methods.And Optimization sponge/Ag+ultrasonic treatment conditions,concentration of dioxins treatment,sponge iron dosage and time ultrasound conditions were optimized to explore the sponge method of dioxin treatment.Experimental results show that the sponge iron/Ag+ultrasound sys-tem conditions can not restore degraded de-chlorination of dioxins,which needs further inquiry.