The invention discloses a working ladder for overhead electric power circuit maintenance. The working ladder comprises two vertical columns, a plurality of cross rods, a safety cage, an overturning rest platform, a fixed table plate and safety hooks, the vertical columns are parallelly arranged, the cross rods are vertically welded between the vertical columns, abrasion-resistant supporting leg sheaths wrap the bottom ends of the vertical columns, and the safety hooks are connected at the top ends of the vertical columns. The working ladder does not easily topple over or turn on one's side, asafety coefficient of a maintainer is improved, climbing of the maintainer is facilitated, the overturning rest platform is conveniently unfolded, so that the maintainer stands on the overturning restplatform to take a rest or maintain circuits, restores and saves physical power, falling of the maintainer is prevented, the overturning rest platform is conveniently folded and does not prevent themaintainer from climbing or standing on the cross rods among the safety cage and the vertical columns, climbing and using convenience of the maintainer is improved, and the working ladder is applicable to maintenance of overhead electric power circuits.