Based　on　the　carbon　emission　model　of　＇motor　vehicles＇,　the　evolution　and　regional　distribution　characteristics　of　road　carbon　emissions　in　Beijing-Tianjin-Hebei　region　from　2005　to　2020　were　analysed　by　using　the　average　annual　mileage　and　fuel　consumption　of　different　types　of　motor　vehicles.　And　a　fleet　of　vehicles　with　different　ages　was　established　using　the　survival　curves　of　different　types　of　motor　vehicles.　The　results　showed　that　the　road　carbon　emissions　of　Hebei　were　growing　rapidly,　with　an　average　annual　growth　rate　of　7.14%　in　the　past　five　years,　while　the　road　carbon　emissions　of　Beijing　and　Tianjin　have　entered　a　period　of　slow　growth,　the　average　annual　growth　rate　of　road　carbon　emissions　in　the　past　five　years　were　only　1.01%　and　2.27%　respectively.　Cars　was　the　main　vehicle　type　of　road　carbon　emissions,　whose　carbon　emissions　accounted　for　more　than　50%　of　the　total　emissions　in　the　Beijing-Tianjin-Hebei　region.　The　contribution　of　the　light　duty　trucks　to　road　carbon　emissions　in　Beijing　road　was　becoming　more　and　more　prominent,　while　the　light　and　heavy　duty　trucks　in　Hebei　and　Tianjin　were　gradually　emerging　as　the　main　driving　factor　for　the　growth　of　road　carbon　emissions.　According　to　the　4km×4km　grid　distribution　of　road　carbon　emission　in　Beijing-Tianjin-Hebei　region,　the　carbon　emission　intensity　in　Beijing　and　Tianjin　was　much　higher　than　that　in　Hebei　Province　due　to　much　denser　roads.　©　2022　Chinese　Society　for　Environmental　Sciences.　All　rights　reserved.