The invention discloses an electric repairing ladder. The electric repairing ladder comprises a base; one end of the base is hinged to a base ladder; the other end of the base is hinged to a sleeve; a motor is arranged at the upper part of the base ladder; the motor is matched with a driving gear; the base ladder and the sleeve are provided with thread knobs; the end parts of the thread knobs are in rotary match with a rotary gear head; the base ladder is arranged in a drawing ladder in a sleeved way; the sleeve sleeves a retractable rod; the drawing ladder and the retractable rod are provided with racks; the top end of the drawing ladder is hinged to the top end of the retractable rod through a hinging shaft; the base is provided with a drawing bottom rod; a lateral supporting leg box is arranged at the side part of the base; the lateral supporting leg box is internally hinged to a lateral supporting leg; a thread supporting leg is further arranged at one end of the lateral supporting leg box. The span and height of the electric repairing ladder can be flexibly adjusted, and electric drive can be adopted, so that labor saving and convenience are realized in a utilization process; a manual retracting method can also be used when no electricity exists, so that the electric repairing ladder is wide in applicable range, firm in fixation and high in safety.