Abstract: Steam turbine generators play a crucial role in power plants, as their efficiency directly impacts the economic benefits of the plant. Therefore, it is of utmost importance to improve the efficiency and quality of maintenance for steam turbine generators.In this paper, we address the issues related to the current technique of removing the inner end cover of the generator, which requires the coordination of three hoists for flipping without any support points. This method not only has low efficiency but also poses various risks, such as compression, collision, and potential equipment or personnel injuries.To avoid potential hazards associated with the current technique, extensive research and analysis have been conducted, leading to the development of a flipping tool for the disassembly and assembly of the inner end cover of the steam turbine generator. This optimized approach utilizes the support of the flipping tool to rotate the inner end cover along a fixed trajectory, effectively eliminating the drawbacks of the existing technique. This innovative tool prevents compression, collision, and detachment during the disassembly and assembly of the inner end cover, reducing the risk of equipment and personnel injuries. As a result, it not only lowers the operational risks but also improves work efficiency, ensuring the quality of maintenance.