Climbing frame for building construction tower crane

The utility model discloses a climbing frame for a building construction tower crane, and relates to the technical field of climbing frames. The climbing frame comprises a climbing frame body, a crawling ladder and a guide rail are fixed to the climbing frame body in the height direction of the climbing frame body, a sliding groove is formed in the guide rail in the height direction of the guide rail, a sliding block matched with the sliding groove is arranged in the guide rail, a through hole is formed in the side, extending out of the sliding groove, of the sliding block, a movable cavity is formed in the sliding block, and the through hole is communicated with the through hole. A plurality of pawls are hinged to the two sides of the sliding block and located in the movable cavity, and the tips of the pawls face downwards. When a worker climbs upwards, a sliding block is driven to move, meanwhile, a guide rail extrudes a pawl and moves the pawl into a movable cavity, the sliding block moves upwards along a