The invention relates to an electric arc protection apparatus used for a high voltage power transmission line. The electric arc protection apparatus comprises an electric arc telescopic collection control system (3), upstream and downstream high voltage power transmission line connecting lines (6), a left telescopic electric arc isolation apparatus control line (10) for a first transmission line, a right telescopic electric arc isolation apparatus control line (11) for the first transmission line, a right telescopic electric arc isolation apparatus control line (12) for a second transmission line, a left telescopic electric arc isolation apparatus control line (13) for the second transmission line, a left telescopic electric arc isolation apparatus (14) and a left telescopic electric arc isolation controller (15). By adoption of the electric arc protection apparatus, a metal aluminum foil isolation cover can be automatically telescopic in a connecting place of a power transmission line insulating body according to changes of a surrounding magnetic field so as to perform electric arc isolation and protect the safety of the high voltage power transmission line; and meanwhile, solar power generation is utilized and the generated electricity is stored in a battery pack to supply power to the electric arc protection apparatus used for the high voltage power transmission line, thereby ensuring the stable operation of the electric arc protection apparatus.