The utility model provides a steel pipe pole protects cat ladder of cage with double -barrelled area, including climbing structure and watch box, the climbing structure includes two steel pipes, sets up climbing stull and the fixed ironware of climbing on the steel pipe, the climbing stull with the fixed ironware both ends of climbing respectively with two perpendicular fixed connection of steel pipe, the climbing stull is a plurality of with the fixed ironware of climbing, sets up connecting portion on the fixed ironware of climbing, the watch box includes the fixed ironware of protective shroud and watch box, and the protective shroud is a plurality of, and the protective shroud both ends are connected through two steel pipes of the fixed ironware of watch box with the climbing structure. The utility model discloses safety to stability, installation and the maintainer of cat ladder provides fine guarantee. In addition, the small dimension length of accepted standard designs, can dispose the pole section of arbitrary standard length, is favorable to the standardization of processing, installation.