Green innovation is increasingly becoming a key way to address environmental issues. Due to the negative impact of green patent bubbles on sustainable development, this paper emphasizes the significance of green innovation quality. Using data from China’s A-share listed companies from 2008 to 2020, this paper investigates the impact of corporate social responsibility (CSR) on green innovation quality. The findings suggest that CSR promotes high-quality green innovation while inhibiting low-quality green innovation. Willingness to innovate and ability to innovate are the mechanisms through which CSR influences high-quality green innovation.