In this paper,a threshold regression model with panel data of 203 prefecture-level cities in China's mainland from 2011 to 2019 is constructed to analyze the relationship between the level of enterprise's Financial Technology (FinTech) development and non-CO₂ greenhouse gas emissions.The structural characteristics and regional heterogeneity of FinTech impact on enterprise's non-CO₂ greenhouse gas emissions were verified.It is found that the FinTech development presents a significant pollution reduction effect and can suppress non-CO₂ greenhouse gas emissions.Specifically,the industrial sulfur dioxide emission reduction is emphasized when the enterprise's FinTech level is low,while the industrial nitrogen oxide emission reduction capacity enhances when the FinTech level is high.In addition,there is a structural effect of the level of FinTech on the role of enterprise's pollution emission reduction.Compared with the depth of FinTech usage and the degree of financial digitalization,the breadth of FinTech coverage poses significantly stronger influence on the emission reduction of non-CO₂ greenhouse gases.Moreover,regional differences are found in the effect of FinTech on non-CO₂ greenhouse gases emission reduction,where it is more significant in the central region than in the eastern and western regions.The results of the study have implications for the implementation of differentiated FinTech development strategies,as well as for the promotion of comprehensive green transformation of socio-economic development,and the achievement of the "double carbon" goal.