This paper explores the relationship between ESG ratings and real earnings management using the data of Chinese listed companies from 2008 to 2021. We find that ESG ratings and real earnings management are negatively correlated. It reveals that the improvement of ESG rating will help to improve the level of corporate governance, standardize the business activities of enterprises and thus help to reduce the real earnings management of enterprises. Our findings still hold after controlling for potential endogeneity and robustness issues. Further analysis shows that internal and external oversight of companies further strengthens the negative relationship between ESG ratings and true earnings management. Overall, the impact mechanism of ESG rating on real earnings management revealed by us has clear policy implications for how managers can improve the quality of information disclosure in emerging markets.