Power equipment is distributed in a large amount and runs uninterruptedly, and its parts have a high probability of damage. Steam turbine is the core equipment of thermal power generation. Due to the special working conditions of high temperature and heat, it is necessary to repair damaged unit parts, such as main shaft diameter and moving blades, on a regular basis every year. Gas turbines are often damaged due to their working under high temperature conditions as high as 1300°C. Using laser remanufacturing technology to repair all its defects and restore its performance, the cost is only 1/10 of the price of the new unit.