Digitization is the commanding height of agricultural modernization，and agricultural carbon reduction is the difficulty of the "three rural" issues.Studying the relationship between digitization and agricultural carbon reduction can help explore new paths for achieving carbon peaking and carbon neutrality goals in the field of agricultural production.Taking 30 provinces （cities and districts）in China from 2003 to 2018 as the research object，this paper explores the dynamic relationship between between rural digitization level and agricultural carbon reduction based on the construction and measurement of indicators of both，and further analyzes the impact of rural digitization level on agricultural carbon reduction in different regions.The results show that the dynamic impact of rural digitization on agricultural carbon reduction varies across industries. Faced with the impact of rural digitization，the net carbon sink of planting industry shows a stable positive response throughout the entire investigation period，while the carbon emissions of animal husbandry generally shows an overall negative response. From a later trend perspective，the impact of rural digitization on planting industry is greater than that on animal husbandry. The improvement of rural digitization level can significantly promote the national agricultural carbon reduction，but the impact of rural digitization level on animal husbandry is constrained by the level of human capital，while its impact on planting industry is not constrained. There are regional and industrial differences in the impact of rural digitization on agricultural carbon reduction，which is beneficial for significantly increasing the net carbon sink of planting in the eastern region and significantly reducing the carbon emissions of animal husbandry in the eastern and central regions.However，it is not significant for the planting industry in the central and western regions， as well as the animal husbandry in the western region. 4）Increasing fiscal support for agriculture contributes to agricultural carbon reduction. Except for the insignificant impact on carbon reduction in the animal husbandry in the western region， fiscal support for agriculture is significant in reducing carbon emissions in other regions.