Circuit fortune dimension companion ladder

The utility model provides a circuit fortune dimension companion ladder for make things convenient for electric power maintainer to carry out transmission line's maintenance in the open air. Be equipped with the mount on the upper portion of base, the main part of mount is equipped with a plurality of first oblique pull rods for lieing in the first montant on four corners in the rectangle between two first montants of the left and right sides, be equipped with a plurality of climbing poles between two first montants of front and back, and the slidable mounting of liftable has the adjustable shelf in the inner chamber of mount, is equipped with the drive assembly that the drive adjustable shelf goes up and down between adjustable shelf and mount, be equipped with the footboard at the top of adjustable shelf, state the footboard and be equipped with the guardrail around. Be equipped with a pair of guide rail respectively on the lateral wall around the base, slidable mounting has the telescopic link on each guide rail, at the articulated landing leg of installing of telescopic link free end. This companion ladder can go up and down the staff to the eminence, and setting up of landing leg can increase holistic stability to guarantor's balance, setting up of guardrail can prevent falling of staff.