The application of electric arc furnace for high temperature melting treatment of fly ash wassystematically studied from fly ash pretreatment,feeding,high temperature electric arc furnace,slag dis-charge system,flue gas treatment and so on. The results showed that the pretreatment of fly ash reducedthe generation rate of secondary fly ash from 7.5% to 6.1%,and also reduced the content of Cl、S、Na、K、Zn、Pb in the secondary fly ash. Direct water quenching of high temperature slag improved the struc-ture density of melt and energy utilization efficiency. The composite ceramic fiber filter could removevarious pollutants in flue gas simultaneously.