Metal purification equipment, metal refining equipment advantages to reduce impurities in the coating to improve the purity of the electrolysis. Because at the moment electrolysis, pulsed current role of metal ions only, like a filter, so that would be useful metal ions to be deposited on the electrode, and the filter impurities ,, improve its high purity electrolytic mass transfer efficiency, easy operation , containing a small amount of material can handle suspended solids. Simple structure, can be enlarged to a larger scale. Solvent extraction because of its high efficiency, less material back, easy to operate, adaptable, short production cycle, high metal recovery. Therefore, the device can be used not only to purification of gold, but also can be used for the refining of gold