A crawling ladder for generator maintenance is composed of two side beams, a plurality of cross beams welded and fixed between the two side beams and four transverse connecting rods extending to a generator stator rack. A top plate fixed with the upper rack is arranged at the upper ends of the two side beams, and a bottom plate fixed on the ground is arranged at the lower ends of the two side beams; and the four transverse connecting rods extending to the generator stator frame are respectively welded and fixed at the upper parts and the lower parts of the two side beams, connecting plates arearranged at the head ends of the four transverse connecting rods, and the four transverse connecting rods can be combined with the generator stator frame through the connecting plates. The manufacturing cost is low; the occupied area is small; the device is fixedly arranged on one side of a generator stator base in a generator wind tunnel. According to the utility model, convenience is provided for maintenance personnel to climb to maintain the upper part of the generator stator, the climbing safety of the maintenance personnel is improved, the maintenance personnel can be prevented from treading important components and control cables of generator equipment in the climbing process, the generator equipment is effectively protected, and the application prospect is very wide.