Copper with a purity of 60% is cast into copper plates or directly put into the surrounding titanium basket in the form of copper slag as the anode. During the electrolysis process, Cu2+ obtains electrons at the cathode and becomes copper with a purity of more than 90% and adsorbed on the cathode titanium cylinder. At the same time, metals such as gold, silver, palladium, and platinum remain in the anode mud. After the anode mud is cleaned, it is reduced and oxidized in a medium frequency furnace to obtain precious metal alloy blocks, which are then broken by water and separated by precious metal liquid extraction to refine various precious metals.