This paper uses the provisions of the Soil Pollution Prevention and Control Action Plan for industrial and mining enterprises as a quasi-natural experiment and constructs a difference-in-differences (DID) model to study its effect on increasing the quantity and improving the quality of green innovation based on a panel of 453 industrial and mining enterprises in Shanghai and Shenzhen A-shares in China from 2011 to 2020. The results show that the Soil Plan can significantly promote the increase of green innovation and the quality of industrial and mining enterprises, and the results are still valid after a series of robustness tests. The mechanism test shows that the Soil Plan promotes the quality of green innovation by alleviating the financing constraints of industrial and mining enterprises, but the impact on their incremental quantity is not significant. The heterogeneity analysis shows that the effect of the Soil Plan on the quality of green innovation is stronger in the sample with a more independent board of directors and a digital mine transformation. This paper enriches the results in the field of soil pollution prevention and industrial and mining enterprises, and has important implications for the practice of promoting green innovation in Chinese enterprises.