Based　on　the　BVOCs　emission　inventory,　WRF-CMAQ　model　was　used　with　scenario　analysis　to　investigate　the　effects　of　BVOCs　emissions　on　O3　and　PM2.5　in　the　Beijing-Tianjin-Hebei　region　in　July　2018.　The　effects　of　BVOCs　emissions　from　different　vegetation　types　on　O3　and　SOA　concentrations　in　Beijing,　Handan,　Chengde,　Baoding　and　other　cities　were　quantitatively　analyzed,　which　was　verified　with　the　O3　and　SOA　formation　potential　method.　As　the　results　showed,　the　contributions　of　BVOCs　emission　to　O3　in　Beijing,　Handan,　Chengde　and　Baoding　were　30.19%,　24.77%,　35.56%　and　26.73%,　respectively,　and　the　contributions　to　SOA　were　2.55%,　3.32%,　4.17%　and　3.59%,　respectively.　Trees　and　orchards　showed　the　greatest　influences　on　O3　and　SOA　in　Beijing　and　Chengde,　while　grassland　and　crops　showed　the　greatest　contributions　in　Handan　and　Baoding.　Additionally,　the　results　of　numerical　simulation　and　of　potential　generation　method　showed　relatively　consistent　results.　©　2023　Chinese　Society　for　Environmental　Sciences.　All　rights　reserved.