Flexible ladder of ascending a height

The utility model discloses a flexible ladder of ascending a height, including outer ladder in the right side and the outer ladder in a left side, be equipped with right manhole ladder and left manhole ladder in it respectively, right manhole ladder and left manhole ladder top evenly are equipped with interior crossbearer through 180 semi -automatic circulator fixed connection, the interior terminal surface of left manhole ladder, and are equipped with ka dong on the left manhole ladder both sides of crossbearer in corresponding, evenly are equipped with outer crossbearer on the lateral surface of the outer ladder in a left side, and the outer crossbearer both ends of the top are equipped with bolt connection spare, and bolt connection spare can be pegged graft in calorie hole. The utility model discloses when the structure need be opened the extension ladder both sides, the outer terraced angle in both sides can be fixed through 180 semi -automatic circulators to outer ladder in the right side of pulling bot