Crawling ladder capable of being rapidly installed

The utility model discloses a crawling ladder capable of being quickly installed, which relates to the technical field of crawling ladders, and comprises a crawling ladder body, a first sliding chute arranged along the height direction of the crawling ladder body, an extension ladder connected to the first sliding chute in a sliding manner, and a movable sliding block fixedly connected to the extension ladder positioned in the first sliding chute, a safety belt used for being installed on the body of a worker is fixedly connected to the movable sliding block, and a transmission assembly used for driving the movable sliding block to move along the first sliding groove is arranged in the first sliding groove. The extending ladder can be controlled to extend upwards by a free distance according to the position of a construction position, and the safety belt and the extending ladder are driven to move together through the transmission assembly while the height is increased, so that the safety belt can be always p