Investigating　the　fiscal　decentralization＇s　effect　on　the　carbon　intensity　of　agricultural　production　may　assist　the　United　States　in　reaching　its　carbon　peak　and　becoming　carbon　neutral.　This　paper　delves　into　the　investigation　of　the　spatiotemporal　patterns　and　internal　relationships　between　fiscal　decentralization,　agricultural　carbon　intensity,　and　environmental　regulation.　The　goal　was　achieved　by　using　the　spatial　Durbin　model　using　panel　data　for　49　states　of　the　United　States　from　2000　to　2019.　The　study　has　found　that　environmental　regulations　play　a　significant　role　in　reducing　regional　carbon　emissions　in　agriculture　and　contribute　positively　to　carbon　emissions　control.　However,　fiscal　decentralization,　which　grants　local　governments　more　financial　autonomy,　has　a　positive　but　insignificant　impact　on　carbon　emissions,　indicating　that　the　prioritization　of　economic　development　and　carbon　control　over　environmental　protection　is　favored　by　local　governments.　In　examining　the　impact　of　environmental　regulations　on　carbon　emissions,　the　study　reveals　that　fiscal　decentralization　does　not　play　a　substantial　role　in　moderating　this　relationship.　To　promote　low-carbon　agriculture　projects　and　ensure　coordinated　economic　and　environmental　development,　the　study　recommends　optimizing　the　fiscal　decentralization　system,　formulating　different　policies　for　different　regions,　and　regulating　the　competencies　of　local　governments　through　an　effective　examination　system.　The　study　concludes　that　it　is　crucial　to　obtain　data　at　the　city　or　county　level　to　accurately　understand　the　relationship　between　agricultural　carbon　intensity,　environmental　regulation,　and　fiscal　decentralization.　As　a　result,　the　central　government　must　focus　on　perfecting　the　fiscal　decentralization　system,　developing　a　differentiated　agricultural　carbon　emission　control　system,　controlling　competition　among　local　governments,　and　perfecting　a　political　performance　assessment　system.