Abstract: A distribution map of atmospheric corrosion grade in Zhejiang Province was drawn through on-site coupon tests for common metals of carbon steel, zinc and copper in countries of Zhejiang Province in combination with the influence of industrial corrosion sources and operating experience. This distribution map can provide basic data for site selection, anti-corrosion design, and maintenance of metal structures of electrical equipment in Zhejiang Province. According to the atmospheric corrosion grade distribution map of Zhejiang Province, about two-thirds of areas in Zhejiang Province belongs to heavy corrosion atmospheric environment of C4 (including) and above grades.