Non-road　mobile　source　is　an　important　source　of　air　pollutants，which　has　gradually　attracted　people＇s　attention.　The　purpose　of　this　study　is　to　establish　an　emission　inventory　of　typical　non-road　mobile　sources　in　the　Beijing-Tianjin-Hebei（BTH）region，and　to　analyze　emission　control　policies　and　costs.　The　results　show　that　the　emissions　of　CO，HC，NOx，PM2.5　and　SO2　from　typical　non-road　mobile　source　s　in　BTH　region　in　2020　were　286.96×103，232.17×103，364.30×103，34.15×103　and　4.14×103　t.　The　emission　of　agricultural　machinery　was　larger　than　that　of　construction　machinery，accounting　for　46.36%　~　91.62%　of　the　total.　Under　the　Integrated　Scenario（IS），the　emissions　of　CO，HC，NOx，PM2.5，and　SO2　in　2030　increased　by　-54.16%，-33.76%，-42.46%，-54.07%，and　-10.37%.　Under　a　single　control　scenario，the　Update　emission　standards（UES）scenario　has　the　best　emission　reduction　effect　on　the　five　pollutants，and　the　Controls　on　in-use　vehicles（CIV）scenario　has　the　best　emission　reduction　effect　on　NOx　and　PM2.5，Raise　the　level　of　electrification（RLE）scenario　has　a　good　effect　on　HC　emission　reduction.　In　order　to　analyze　the　differences　of　pollution　control　measures　among　cities，the　unit　costs　of　reducing　emissions　for　13　cities　were　calculated　in　this　study，which　ranged　from　3.61　to　9.01　yuan∙g-1，as　well　as　the　ratio　of　per　capita　GDP　to　emission　reduction　cost　per　unit　is　used　as　an　index　to　evaluate　the　priority　of　implementing　emission　reduction　policies　in　each　city.　The　results　showed　that　Beijing，Tianjin，Tangshan　and　Shijiazhuang　should　be　given　priority　to　the　implementation　of　emission　reduction　policies，which　could　reduce　more　pollutant　emissions　with　the　least　economic　burden.　©　2023　Science　Press.　All　rights　reserved.