The invention relates to an overhaul platform ladder and a using method thereof, and relates to the technical field of electric power maintenance equipment. The overhaul platform ladder is designed tosolve the problem that existing electric overhaul equipment is high in safety potential hazards, poor in adaptability and inconvenient to use. The overhaul platform ladder comprises a formwork connecting module, a platform ladder body and an anti-falling module. The formwork connecting module is mounted on formwork and comprises a horizontal adjusting assembly and a vertical adjusting assembly, and the formwork connecting module can be matched with the external contour of the formwork and clamped on the formwork through the horizontal adjusting assembly and the vertical adjusting assembly. The platform ladder body is mounted on the formwork connecting module, and the platform ladder body insulates the formwork connecting module and the anti-falling module. The anti-falling module is detachably mounted on the platform ladder body and comprises a hanging ring for allowing a safety ring to pass through. The using method for the overhaul platform ladder uses the overhaul platform ladder to overhaul electric power equipment. The overhaul platform ladder is used for realizing overhaul and maintenance of the outdoor high-altitude power equipment by operators.