In the daily inspection process of the power station boiler, the following parts will be inspected: various types of boiler coupling box, boiler internal and external pipelines, the center hole of the steam engine shaft, the internal condition of the turbine, the internal condition of the other container cavities and the internal condition of the other pipelines and so on. Boiler equipment maintenance, overhaul is to ensure the safety of boiler equipment, economic operation, improve the availability of boiler equipment coefficient of an important link, is every maintenance personnel must pay attention to overhaul work.