This paper takes financing efficiency as the starting point to empirically study the impact of capital adequacy ratio of commercial banks on financing efficiency. This paper takes 15 commercial banks from 2018 to 2020 as a research sample, and finds that capital adequacy ratio significantly positively affects financing efficiency. The improvement of capital adequacy ratio can effectively improve financing efficiency from bank performance, risk assets and other risks. Finally, this paper puts forward relevant opinions on the research conclusions, and provides solutions for banks to improve financing efficiency.