This article first scientifically measures the current status of the agricultural net carbon effects in various regions and uses the nuclear density estimation method to explore its dynamic evolution characteristics.Then,spatial measurement methods are used to analyze the impact of industrial agglomeration on the agricultural net carbon effects,and its spatial spillover effect is discussed.The research results show that:1)In 2018,there were significant differences and even serious polarization in the net carbon effect of agriculture in various provinces in China.Compared with 2000,the net carbon effect of agriculture in various regions has been balanced,and the overall gradient difference has gradually tended to converge.The number of high-value provinces has increased greatly,and the number of low-value provinces has slightly decreased.2)There is a spatial autocorrelation between industrial agglomeration and the net carbon effect of agriculture,and there is a “positive N” relationship between the two,that is,as the degree of agglomeration of agricultural industries continues to increase,the net carbon effect of agriculture generally shows a characteristic of three stage change of “first increase,then decrease,then increase”.Specifically,with every 1 percentage point increase in industrial agglomeration in a region there was an increase in the amount of agricultural net carbon effect by 1.621%; in addition,variables such as agricultural public investment,agricultural industrial structure，the level of regional economic development and so on also showed a certain positive effect,though it was obviously weak.3)The agglomeration of agricultural industry has a significant spillover effect on the net carbon effect of agriculture,which is manifested as inter-regional spillover and intra-regional spillover.Specifically,with every 1 percentage point increase in industrial agglomeration there was an increase the agricultural net carbon effect of neighboring areas by 2.286%.The net carbon effect of local agriculture will increase by 0.060% due to feedback.Finally,based on the research conclusions,countermeasures are proposed.