O3　and　PM2.5　pollution　are　prominent　in　the　Beijing-Tianjin-Hebei　(BTH)　region,　and　volatile　organic　compounds　(VOCs)　are　important　precursors　of　both.　However,　few　studies　has　been　conducted　to　establish　a　high-precision　BVOC　emission　inventory　by　vegetation　types　and　species　for　the　BTH　region　yet,　and　to　further　analyze　the　contribution　of　BVOC　emissions　to　O3　and　PM2.5　on　this　basis.　This　study　established　an　emission　inventory　of　biogenic　volatile　organic　compounds　(BVOCs)　in　the　BTH　region　using　two　methods:　(a)　the　coupled　method　of　stock　volume　conversion　and　plant　function　types　(PFTs)　and　(b)　MEGAN　method.　The　contributions　from　different　vegetation　types　to　O3　and　PM2.5　in　the　BTH　region　in　July　2018　were　simulated　with　WRF-CMAQ　and　verified　using　the　O3　and　secondary　organic　aerosol　(SOA)　formation　potential　method.　Relatively　consistent　results　were　obtained　using　the　different　inventory　establishment　and　air　quality　impact　analysis　methods.　Fruiters,　crops,　shrubs　&　grasslands,　evergreen　forests,　and　deciduous　forests　emitted　6.25%,　31.18%,　18.27%,　11.42%,　and　32.88%　of　total　BVOCs,　respectively.　The　simulation　results　showed　that　BVOCs　contributed　23.73%　to　O3　and　37.99%　to　SOA　in　the　BTH　region.　Deciduous　trees,　such　as　poplar　and　Quercus,　were　the　main　contributors　to　O3,　while　Pinus　tabulaefoimis　and　Quercus　were　the　main　contributors　to　SOA.