Abstract: A furnace residue washing method includes collecting residue from a furnace, cooling the residue by water and screening the residue by different dimension scales, separating the screened residue by different iron contents, separating and depositing sand from the cooling water, crushing the screened residue of large dimension scale, separating the screened residue of large dimension scale by different iron contents and recollecting separately the separated and screened residue of large dimension scale.