The lead dioxide electrode has the characteristics of low resistivity, stable chemical properties, good corrosion resistance, good conductivity and can pass through large current. It has three-dimensional structure coating (precious metal oxide + α - PbO2 + β - PbO2), which greatly improves the adhesion of the coating. It can be used in electrowinning copper, nickel, cobalt and other fields in hydrometallurgy industry, as well as in electroplating, metallurgy, domestic sewage treatment, persulfate production, phenol wastewater fading treatment, oilfield wastewater, printing and dyeing wastewater, ammonia nitrogen wastewater treatment and other fields.