This paper investigates the impact of Chinese firms’ ESG performance on their financial constraint and financing activities. We find a negative association between firms’ ESG performance and their financial constraint driven by the Chinese government’s commitment to tackling climate change. Compared with state-owned enterprises (SOEs), non-SOEs have alleviated their financial constraint through both equity and debt issuance, thanks to the stock price appreciation and green credit. High-pollution firms benefit from both equity and debt issuance, while low-pollution firms mainly finance through equity issuance. Our findings demonstrate the leading role of the Chinese government in its domestic capital markets.