The TB Hydropower Project is located in the canyon area of northwest Yunnan, with poor natural conditions, complex geological conditions, high technical difficulties, long construction lines, tight schedules, overlapping peak periods, short design cycles, and high technical requirements. To build a 158 m roller compacted concrete gravity dam project with high quality, the construction unit needs to carefully plan and organize. By reviewing the design technology management system, management mode, scientific research planning and breakthrough, design optimization, and other related work during the construction process of TB Hydropower Project, the innovation and practical process of project design and technology management has been analyzed and summarized, which can provide reference for the management of similar projects at home and abroad.