Under the leadership of the "double carbon" goal， carbon finance， as a financial instrument that can promote carbon emissions control， has a significant impact on enterprises' outward foreign direct investment. Based on OFDI data from listed companies from 2010 to 2020， this study has deeply investigated the role of carbon finance on enterprises' OFDI and its inherent mechanism. The research results has showed that carbon finance has significantly promoted the OFDI， and the conclusion still holds after a series of stability tests. Further mechanism inspection has revealed that carbon finance can promote the enterprises' OFDI by alleviating corporate financing constraints， improving its production and operation efficiency， and strengthening internal control. By exploring the impact of carbon finance on corporate OFDI， this study aims to provide valuable inspiration for the sustainable development of enterprises and the adjustment of investment strategies.