Abstract:The British Green Investment Bank (GIB) is the first green investment bank in the world, focusing on green technology transformation. It was acquired by Macquarie Group in 2017, completed its privatization and was renamed the British Green Investment Group (GIG) to support global green economic growth by investing in green infrastructure and technology projects. This paper investigated the evaluation index system, screening process, project area and effectiveness of green project investment in GIG. Through the study of the professional project screening and evaluation mechanism, making clear focus on investment project areas, we found that GIG paid attention to the green attributes of the project, also the economic return and market value of the project. By drawing on the investment experience of GIG green projects, it provides empirical ideas for the development of green technology bank in China.