Based on China's provincial panel data from 2011 to 2020, two-way fixed effect, mesomeric effectmodel and spatial econometric model are used to study the impact of digital finance on regional carbon emission intensity. It is found that the development of digital finance has a significant inhibitory effect on carbon emission intensity, and the conclusion remains valid after endogeneity treatment. Digital finance has reduced carbon emission intensity through the upgrading of economic development quality and industrial structure. The analysis of spatial spillover effects indicates that digital finance has a positive spatial spillover effect on the carbon emission intensity of neighboring regions. Therefore, close cooperation should be maintained among regions to continuously promote the high-quality development of digital finance and develop digital finance according to local conditions.