江汉大学学报（自然科学版）

绿色金融改革创新试验区的实施对于推动生态文明建设和完善绿色金融体系具有重要意义。基于2013-2023年全国地级市面板数据，运用空间双重差分（SDID）模型和双重机器学习（DML）方法实证分析绿色金融改革创新试验区政策对城市碳排放水平的影响及作用机理。结果表明，绿色金融改革创新试验区政策显著降低了试点城市的碳排放水平，但该政策的碳减排效果主要局限于试点城市内部，且对东部城市、环境规制强度较高和产业结构高级化程度较高城市的碳减排效应更显著。该政策主要通过促进绿色技术创新和提升能源利用效率来降低城市碳排放。最后，从政策实施、环境规制体系优化、产业结构高级化、绿色技术创新强化及能源效率提升等方面提出建议。

The implementation of the Green Finance Reform and Innovation Pilot Zone policy is of great significance for promoting ecological civilization construction and improving the green finance system. Based on panel data of prefecture-level cities across China from2013 to 2023,this paper empirically analyzes the impact of the Green Finance Reform and Innovation Pilot Zone policy on urban carbon emissions and its underlying mechanisms by using the Spatial Difference-in-Differences(SDID) model and a Double Machine Learning(DML) method. The results show that the policy has significantly reduced the carbon emission level of the pilot cities. However,the carbon reduction effect is mainly confined to the pilot cities themselves. Moreover,the carbon emission reduction effect is more significant in eastern cities,cities with stronger environmental regulations,and cities with a higher level of industrial structure sophistication. This policy mainly curbs urban carbon emissions by promoting green technological innovation and enhancing energy utilization efficiency. Finally, policy recommendations are proposed in terms of policy implementation,optimization of the environmental regulation system,industrial structure upgrading,strengthening of green technological innovation,and improving energy efficiency.