Green credit is an important initiative for developing green economy today, and whether commercial banks can enhance their profitability by implementing green credit business has received wide attention. From the perspective of green credit, a theoretical analysis of the impact of green credit on the profitability of commercial banks was conducted,and a relevant empirical analysis and heterogeneity test was conducted based on the panel data of Chinese commercial banks from 2013-2021. It is found that conducting green credit business shows a positive impact on the profitability of commercial banks, and the impact is more obvious for state-owned commercial banks, but not for non-state-owned commercial banks.