Given the increasing prevalence of global warming and the frequent occurrence of extreme weather events and other challenges, countries are increasingly recognizing the importance of green and sustainable development. This paper uses the multi-period double difference and PSM-DID method to test the impact of green finance policies on the ESG performance of Chinese listed companies. Research has shown that implementing pilot zone policies can improve corporate ESG performance, especially for enterprises with low business reputations, fierce industry competition, severe information asymmetry, and state-owned attributes. The GFPZ policy drives companies to improve their ESG performance through two paths: promoting environmental innovation and strengthening restrictions on corporate financing. In addition, the increase in economic policy uncertainty hinders the positive impact of GFPZ policies on improving corporate ESG performance. This study enriches the existing micro-research on green finance policies from the perspective of enterprises. It provides empirical evidence and research insights to support the further improvement of pilot zone policies, the promotion of green sustainable development, and the improvement of corporate ESG performance.