Abstract: Based on the unbalanced panel data of Chinese A-share listed manufacturing enterprises from 2009 to 2022， the study uses micro-level digital transformation indicators and empirically examines the impact of digital transformation on carbon emission intensity. The findings reveal that digital transformation in manufacturing enterprises significantly reduces corporate carbon emission levels. Mechanism tests indicate that digital transformation cuts down carbon emission intensity through the innovation effect and coordination effect.Heterogeneity analysis finds that the driving effect of digital transformation on enterprise carbon emission is more significant in competitive industries， non-high-tech sectors and environmentally sensitive industries.