This study comprehensively analyzes the panel data of 4195 listed companies in the A-share market during the period from 2011 to 2022, aiming to explore the mechanism of fintech's influence on corporate green innovation. The study adopts a two-way fixed effects model to confirm the positive association between fintech and corporate innovation, and reveals the role of fintech in promoting corporate innovation output by alleviating financing constraints with the help of a mediated effects model. The findings suggest that FinTech not only directly promotes firms' innovation activities, but also provides important support for firms' innovation by reducing financing constraints, a finding that is confirmed by a series of robustness tests.On this basis, this paper emphasizes that, in the face of market changes brought about by fintech, firms should proactively adapt to and take advantage of these changes to mitigate the pressure of high costs of external financing by maintaining good credit records and reducing information asymmetry. Such a strategy not only helps firms obtain more funds for R&D and innovation, but is also key to achieving sustainable development goals. In addition, policymakers should also recognize the important role of fintech in promoting business innovation and green transformation and take measures to encourage its development and application for the long-term health of the economy.
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