Abstract: Green finance possesses a theoretical foundation for guiding the green allocation of production factors and promoting high-quality economic development through industrial ecologization. This study adopted the methods of Kernel density estimation,ArcGIS spatial distribution analysis,and coupling coordination degree analysis. A threshold effect test was conducted for a total of 108 prefecture and above cities in the Yangtze River Economic Belt from 2013 to 2021. It was found that the spatial and temporal evolution trends of regional green financial development and industrial ecologization level exhibited a certain degree of coupling. Moreover,the impact of green finance on industrial ecologization demonstrated a dual-threshold effect with a stepwise increase,which indicated that the current support of green finance for industrial ecologization remained at a relatively low level. It was found that the national green financial reform and innovation pilot zones had shown certain trickle-down and demonstration effects in the development of green finance and industrial ecologization,and green finance had demonstrated significant industrial ecological benefits by supporting high-tech industries. It was suggested to orderly promote the upgrading and expansion of the pilot zones,optimize the green financial market,empower new productivity with green finance and strengthen the integrated development of green finance with technology finance and inclusive finance. These measures aimed to advance industrial ecologization and support the high-quality integrated development of the Yangtze River Economic Belt.