Using Chinese A-share listed companies from 2006 to 2013 as the research sample, this paper empirically examines the impact and mechanism of the mandatory CSR disclosure policy on Chinese firms’ risk-taking by combining the difference-in-differences (DID) approach. This study finds that the implementation of the policy increases firms’ operating costs and leads to an increase in their financing constraints, which ultimately creates a disincentive for firms to take risks. Second, we also find that, relative to firms that do not disclose CSR reports, the sales revenues, R&D investment and investment levels of firms subject to CSR disclosure are significantly reduced, which may be the result of firms’ tendency to operate conservatively. In addition, heterogeneity analyses suggest that the dampening effect of mandatory CSR disclosure policies on risk-taking is stronger for firms with higher financing costs and for non-state-owned firms. This study further explores the mechanism of the impact of mandatory CSR disclosure on firms’ risk-taking, which will help the government to formulate and improve the information disclosure policy regarding driving the transformation of corporate development in the future.

In China, where the corporate social responsibility (CSR) process is relatively underdeveloped, the government has promulgated a series of laws and regulations on CSR disclosure in recent years to promote the sustainable transformation of the economy. Using data from A-share listed Chinese firms from 2009 to 2021, this study empirically examines the relationship between CSR disclosure quality and firm investment efficiency in China. The results indicate that (1) improvements in CSR disclosure quality significantly mitigate firms’ underinvestment and overinvestment, thereby enhancing investment efficiency. (2) Further analysis shows that high-quality CSR information also promotes investment efficiency by reducing agency costs and financing constraints and improving media evaluations of firms. (3) A heterogeneity analysis suggests that the positive effect of CSR disclosure on investment efficiency is stronger for firms with lower equity incentives, more severe financing constraints, and higher media attention. Our study extends the understanding of the mechanisms through which CSR disclosure affects firms’ investment efficiency, potentially providing insights for research in related fields and guiding future CSR disclosure practices in other developing countries.