Retention type roof crawling ladder with slidable and rising lower section

The utility model discloses a roof crawling ladder with a slidable and re-rising lower section, which comprises a fixed crawling ladder and a sliding crawling ladder, two sides of the fixed crawling ladder and two sides of the sliding crawling ladder are connected through connecting plates, rotating rods are inserted and fixed on two sides of the fixed crawling ladder close to the edge of the bottom, and preformed holes are vertically formed in the outer surfaces of the two connecting plates. According to the utility model, firstly, the fixed crawling ladder is fixedly connected with a wall through bolts; two sides of the fixed crawling ladder are connected with the sliding crawling ladder through connecting plates; a preformed hole in the outer surface of the connecting plate slides on the outer wall of the rotating rod; the connecting rod on one side of the bottom of the connecting plate is slidably connected with a slide rail on the inner wall of the sliding ladder through a pulley;the roof crawling ladder