The utility model provides a ladder for adjustable power maintenance relates to the ladder field. This ladder for adjustable power maintenance, including the box, the both sides at box top are all alternated and are provided with the montant, and the top of two montants passes through diaphragm fixed connection, one end that the montant is close to the box top runs through the top of box and extends to the inside of box, the right side interlude of box is provided with the bull stick, one end that the bull stick is close to the box runs through the right side of box and extends to the inside of box. This ladder for adjustable power maintenance, through the improvement to the box, bull stick, slide rail, slide, first sleeve, first gear, second sleeve, lead screw, second gear, nut, spring, handle and sheathed tube effect down, has reached conveniently and highly to have carried out the effect of adjusting to the ladder to make things convenient for user's use, consequently also improved the work efficiency of ladder for the power maintenance.