Insulating ladder of electric power

The utility model discloses an insulating ladder of electric power, including first ladder frame and second ladder frame, the ladder body is configure into to first ladder frame and second ladder, equal slidable mounting has the extension ladder frame in the inner chamber of first ladder frame and second ladder frame, and the top of two extension ladder framves passes through that the hinge is articulated to be installed, first ladder frame and second ladder frame be articulated expansion plate and the connecting plate installed respectively, the slide bar is installed in the slide of connecting plate inner chamber, and on the lateral wall of slide equidistant be equipped with with the second spacer pin assorted spacing groove of slide bar tip. There is the extension ladder frame through slidable mounting in first ladder frame and second ladder frame, can makes highly can adjusting of this ladder, through the cooperation of second spacer pin and spacing groove, can reach at the ladder and make it fix after re