Due　to　the　rapid　growth　of　fossil　energy　consumption,　countries　worldwide　have　paid　considerable　attention　to　reducing　carbon　emissions.　Moreover,　with　economic　globalization　and　trade　liberalization,　exploring　the　relationship　between　foreign　trade　and　carbon　emission　reduction　has　become　increasingly　critical.　Exploring　this　relationship　can　aid　in　establishing　suitable　recommendations　for　global　carbon　emission　reductions.　This　paper　uses　a　spatial　econometric　model　and　a　dynamic　panel　threshold　model　to　empirically　test　the　spatial　effect,　nonlinear　effect,　and　heterogeneous　effect　of　foreign　trade　on　global　carbon　emissions.　All　the　above　models　are　based　on　the　construction　of　the　economic　weight　matrix　of　different　countries.　The　results　reveal　that　1)　carbon　emissions　in　various　countries　exhibit　with　significant　spatial　spillover　in　the　overall　spatial　context;　2)　foreign　trade　has　a　significant　role　in　promoting　carbon　emissions　in　local　and　similar　economic　areas,　but　it　has　an　apparent　dual-threshold　effect　on　economic　development;　and　3)　there　are　significant　differences　in　the　impact　of　foreign　trade　on　carbon　emissions　in　different　regions　and　different　periods.　Therefore,　in　the　process　of　global　economic　integration,　based　on　their　development　stages　and　comparative　advantages,　countries　can　focus　on　overall　planning　and　coordination　to　promote　the　optimal　allocation　of　resources　and　reduce　carbon　emissions.