To ensure the safety and stable operation of regional power grid and form the localized repair service capability of industrial gas turbine, Huarui has successfully established a set of systematic repair technology for gas turbine hot section components through the transfer, digestion and absorption of foreign repair technology and talent training. This paper introduces the technical process of localized repair of industrial gas turbine hot section components, non-OEM maintenance process standard, post-maintenance inspection and determination ability of thermal barrier coating, and the application of localized repair of gas turbine components.