The utility model is a knife blade overhauling scaffold, relating to a high voltage equipment overhauling scaffold, in particular to an overhauling rack which is applicable for the places which are narrow and can not do hung overhauling and the switch is at the center part of altitude. According to the technique proposal of the utility model, a frame is arranged on the upper end of the insulating bracket; a bottom frame is fixed on the lower end of the bracket; and a locking device which is used for locking up the bottom frame is arranged on the bottom frame. The upper end of the insulating bracket is provided with a linking cover which is used for inserting a connecting bar which is arranged in the linking cover; a latch which is used for tying the safety belt is arranged on the connecting bar. The utility model is characterized in that the utility model has simple structure and can be used conveniently, and can enter narrow space to operate.