Abstract: Taking XX ecological economic zone as an example, aiming at the carbon input and carbon output in agricultural production, the productive efficiency, ecological efficiency and economic efficiency of agricultural carbon in each district and county of XX ecological economic zone were analyzed and calculated, and the time-space difference between carbon efficiency and rural ecological economy in each district and county based on the district and county scale were analyzed empirically. The results showed that agricultural economic output and carbon emissions were one of the decisive factors for the level of ecological efficiency. XX ecological economic zone had greatly improved the level of agricultural production from 2016 to 2019, so the output of crops had also increased. Coupled with the implementation of national preferential policies, the economic efficiency of agricultural carbon also showed an upward trend year by year; the emission of agricultural carbon in XX ecological economic zone was significantly lower than the absorption, indicating that the agricultural ecosystem carbon sink function of this economic zone was strong, but agricultural carbon emissions had a trend to increase year by year.

Key words: carbon efficiency, ecological economy, ecological agriculture, carbon input, carbon output