This study investigates the impact of China's green credit policy on residents' health using a quasi-natural experiment approach. The research analyzes data from 262 prefecture-level cities in China from 2010 to 2021, employing a time-varying difference-in-differences (DID) model to assess the policy's influence on residents' health. The findings reveal that the green credit policy significantly improves residents' health, with this effect remaining robust after various tests. Mechanism analysis indicates that the policy enhances health through environmental improvements and increased public service standards in demonstration cities. Heterogeneity analysis shows that the policy's impact is more pronounced in western and resource-based cities compared to central and eastern cities and non-resource-based cities. The study also highlights the importance of green credit in promoting environmental sustainability and public health. The research suggests that the green credit policy should be broadened and refined to better address public health needs. The study contributes to the understanding of how green credit policy affects residents' health and provides insights for future policy development. The results indicate that green credit policy can significantly improve residents' health by enhancing environmental quality and public services, with greater effects in certain regions and cities. The study also identifies the need for further research to explore the long-term impacts of green credit policy on public health and environmental sustainability.This study investigates the impact of China's green credit policy on residents' health using a quasi-natural experiment approach. The research analyzes data from 262 prefecture-level cities in China from 2010 to 2021, employing a time-varying difference-in-differences (DID) model to assess the policy's influence on residents' health. The findings reveal that the green credit policy significantly improves residents' health, with this effect remaining robust after various tests. Mechanism analysis indicates that the policy enhances health through environmental improvements and increased public service standards in demonstration cities. Heterogeneity analysis shows that the policy's impact is more pronounced in western and resource-based cities compared to central and eastern cities and non-resource-based cities. The study also highlights the importance of green credit in promoting environmental sustainability and public health. The research suggests that the green credit policy should be broadened and refined to better address public health needs. The study contributes to the understanding of how green credit policy affects residents' health and provides insights for future policy development. The results indicate that green credit policy can significantly improve residents' health by enhancing environmental quality and public services, with greater effects in certain regions and cities. The study also identifies the need for further research to explore the long-term impacts of green credit policy on public health and environmental sustainability.