Based on the data of A-share listed companies in Shanghai and Shenzhen from 2007 to 2021, this paper explores the impact of ESG performance on commercial credit financing and its mechanism.The results show that ESG performance improves the enterprise’s commercial credit financing ability; The mechanism test shows that ESG performance improves the efficiency of information transfer and corporate governance, thus affecting commercial credit financing. Distinguishing the sample found that the impact of ESG performance on commercial credit financing was more significant in the low competitive position, non polluting industries, eastern region and post-implementation of environmental laws samples. The above conclusions provide experience for enterprises to carry out ESG practice and improve commercial credit financing.