Abstract: Aiming at the serious corrosion problem of heating surface of high-parameter waste power station boiler, the variation regulation of corrosion rate with wall temperature is summarized. According to the morphology of corrosion medium on the wall, the corrosion curve is divided into electrochemical corrosion zone, weak corrosion zone and high temperature corrosion zone. The corrosion mechanism of each zone is analyzed and discussed, and the key protection for high-parameter water wall and superheater in high temperature zone is put forward. The commonly used protection methods are summarized, and a comprehensive evaluation index system for the performance of protective coatings is established. According to the differences in user needs, two cost-effective and economical protection schemes are given.