The　emissions　of　air　pollutants　from　six　typical　airports　in　North　China　in　2017　were　estimated　using　an　improved　method,　which　considered　the　mixing　layer　height　calculated　based　on　aircraft　meteorological　data　relay　(AMDAR)　and　improved　the　actual　operation　times　of　the　aircraft　under　different　modes.　The　total　emissions　of　NOx,　CO,　VOC,　SO2　and　PM2.5　of　the　six　airports　were　21504.2,　7074.8,　1424.0,　1283.6　and　323.2t,　respectively.　The　emissions　of　NOx,　CO,　VOC　and　SO2　from　aircraft　were　much　larger　than　the　other　emission　sources　in　the　airport,　while　the　emission　contributions　of　PM2.5　were　similar.　The　HC　and　CO　were　mainly　emitted　during　the　taxi　process,　accounting　for　90.6%　and　90.2%,　respectively.　The　NOx,　SO2　and　PM2.5　were　mainly　emitted　during　the　climb　process,　accounting　for　58.9%,38.7%　and　43.5%,　respectively.　The　emissions　of　six　airports　in　January　were　relatively　lower　than　that　in　other　months,　and　the　largest　emissions　were　occurred　in　August.　Based　on　the　detailed　emissions　inventory　of　the　airports　developed　in　this　study,　a　WRF-CMAQ　modeling　system　was　applied　to　investigate　the　impact　of　the　Tianjin　Binhai　International　Airport　emissions　on　the　PM2.5　concentration　in　the　surrounding　regions.　The　results　indicated　that　the　hourly　maximum　concentration　contribution　was　3.24μg/m3　in　the　airport　area,　The　annual　average　and　hourly　maximum　concentration　contributions　to　the　grids　which　were　5km　away　from　the　airport　were　0.08　and　2.84μg/m3,　respectively.　©　2020,　Editorial　Board　of　China　Environmental　Science.　All　right　reserved.