The invention relates to the technical field of electric transmission lines, and discloses an electric transmission line grounding down lead suitable for rapid on-site anticorrosion treatment. According to the present invention, a protection material and an outer sheath are sequentially arranged on the surface of the electric transmission line grounding down lead, wherein the protection material comprises, by mass, 70-80 parts of ceramic micro-powder, 20-30 parts of zinc powder, 10-20 parts of shell micro-powder, 20-30 parts of 3,4-epoxycyclohexylformic acid-3',4'-epoxycyclohexanecarboxylate,6-10 parts of bis[2-(methacryloxy)ethoxy]dimethylsilane, 3-5 parts of triarylsulfonium hexafluoroantimonate salt, 6-10 parts of hyper-branched polyether polyol, 4-6 parts of polyethylene glycol, 1-3 parts of p-phenylenediamine, 1-3 parts of a defoamer, 1-3 parts of a dispersant, and 30-50 parts of ethanol; and the electric transmission line grounding down lead can effectively reduce the corrosionrate of the grounding down lead and greatly prolong the service life, can perform on-site anticorrosion treatment, and is fast and efficient.