<p>This study investigates the impact of green finance development (GFDI) on carbon emission reduction efficiency (CE_CCR) across 208 cities in China from 2010 to 2022. Our findings reveal that GFDI significantly promotes carbon emission reduction efficiency, an effect that is substantially amplified by green technological innovation, as measured by green patent applications and grants.. A heterogeneity analysis indicates regional and natural disparities, with middle and resource-based regions exhibiting a more pronounced effect. The results of the DID analysis of this study further underscore the importance of tailored policy interventions to enhance carbon emission control efficiency. Overall, our research highlights the crucial roles of green finance and technological advancements in promoting sustainable environmental development and effective carbon emission management in China.</p>