The utility model discloses a detachable crawling ladder for a communication tower. The detachable crawling ladder comprises the communication tower and first climbing poles; the outer wall of the communication tower is sequentially provided with at least one outwards convex boss in the height direction; each boss is provided with an internal screw thread hole in the horizontal direction; the first climbing poles are cylinder-shaped; external screw threads are formed in the middle position of the excircle of each first climbing pole; the first climbing poles pass through the internal screw thread holes in the bosses to enable the external screw threads and the internal screw thread holes to be in screw-thread fit; the number of the first climbing poles is equal to that of the bosses; and the first climbing poles mounted outside the communication tower are arranged in parallel mutually and are crawling-ladder-shaped in the height direction of the communication tower. The crawling ladder, which has a simple structure and is attractive in appearance and high in safety, not only improves intensity of the communication tower on the premise of not damaging the structure of the communication tower, but also can implement climbing of one person or a plurality of people and multi-people operation, has a small volume, can be disassembled and assembled, is convenient to carry, is flexible and changeable, is simple to process, is low in cost, does not need to be repaired and has high safety.