Abstract: The present paper constructs an evaluation index system to measure the development level of the digital economy, and then measures the provincial manufacturing carbon emission efficiency based on the MinDS model of global benchmark technology. Then, the present paper empirically tests the impact of the digital economy on China's manufacturing carbon emission efficiency, and conducts a comparative analysis of the action paths. The present paper found that the development level of China's digital economy tends to rise during the survey period. But there is a significant digital divide, which is reflected in the high development level of the eastern region, while the development of the central and western regions is relatively low. The carbon emission efficiency of China's manufacturing shows a upward trend, and presents a spatial pattern of gradual decline from east to west. The digital economy has a significant U-shaped nonlinear impact on the carbon emission efficiency of manufacturing, supporting the hypothesis of EKC. The path test results show that the labor efficiency enhancement effect and the energy factor saving effect are two feasible paths to play the digital carbon reduction effect, and the latter has a relatively greater carbon reduction effect.