The utility model relates to an insulating ladder, concretely relates to power maintenance is with insulating ladder, including terraced body, the ladder body includes two montants and connects the horizontal pole between two montants, two montant tops articulate the connecting block respectively, but run through the bracing piece of pull in two montants and the connecting block respectively, thebracing piece lower extreme sets up the stopper, and two bracing piece inboards are the cross arrangement pedal in opposite directions, terminal two the close montant central line positions of pedal,the pedal can make progress 90 foldingly, the terminal articulated thing dish that carries of connecting block, the montant lower extreme outside sets up the recess, the connecting rod is connected tothe recess internal rotation, the connecting rod end sets up the universal wheel, the horizontal pole saves the telescopic link futilely by two and cup joints and form, montant, horizontal pole, connecting block, bracing piece, pedal surface all scribble insulated paint. The utility model discloses insulating terraced simple structure, the cost of manufacture is low, and the function is various,and height and width are adjustable, convenient to use, operation safety.