This　study　selected　a　rubber　tire　manufacturing　factory　located　in　the　North　China　Plain,　and　conducted　ambient　volatile　organic　compounds　(VOCs)　observation　tests,　and　calculated　the　emission　of　VOCs　based　on　the　inverse-dispersion　calculation　method.　The　monitoring　results　found　significant　differences　in　both　VOC　concentrations　and　chemical　composition　between　the　up-wind　(background)　and　the　downwind　receptors.　The　average　concentrations　of　VOCs　measured　by　the　background　and　receptors　were　53.8　μg•m-3　and　127.5　μg•m-3,　respectively.　Propane　(7.2　μg•m-3),　cetone　(7.5　μg•m-3),　nonanal　(12.7　μg•m-3),　n-butane　(4.9　μg•m-3),　and　acetaldehyde　(2.7　μg•m-3)　were　the　dominant　components　of　background　VOCs,　and　nonanal　(43.5　μg•m-3),　propane　(11.4　μg•m-3),　acetaldehyde　(7.4　μg•m-3),　hexane　(11.9　μg•m-3),　and　n-butane　(7.3　μg•m-3)　were　the　dominant　components　of　receptor　VOCs.　The　difference　in　VOCs　between　the　background　and　receptors　is　considered　to　reflect　contributions　from　the　factory,　the　main　components　of　which　were　of　alkanes　(31.39%)　and　oxygenated　organic　compounds　(33.15%).　Using　the　ISC3　model,　the　relation　coefficient　γ　between　the　downwind　VOCs　increment　and　the　emissions　of　the　factory　was　calculated　for　each　receptor　of　each　test　based　on　the　hourly　average　meteorological　conditions　during　the　observation　period.　Combining　the　relation　coefficient　γ　with　the　difference　in　VOCs　between　the　receptor　and　the　background,　we　calculated　VOC　emission　amounts　from　this　factory　of　152.8±188.2　t•a-1　and　a　VOC　emission　factor　(EF)　for　the　rubber　tire　manufacturing　industry　of　VOC　101.9　g•tire-1.　Our　estimated　EF　was　loser　to　EF　of　U.　S.　AP42　(55　g•tire-1),　but　greatly　lower　than　the　EF　of　China＇s　reference　(900　g•tire-1).　Although　our　calculations　had　a　relatively　higher　standard　deviation,　these　results　are　helpful　for　better　understanding　the　emission　of　VOCs　from　the　rubber　manufacturing　industry.　Based　on　our　calculated　EF,　China＇s　national　VOCs　emissions　from　the　rubber　tire　manufacturing　industry　would　be　approximately　62.13　kt•a-1,　which　represents　a　significant　potential　contribution　to　ozone　formation　(130.87　kt•a-1),　but　the　organic　aerosol　formation　potential　is　small　(0.86　kt•a-1).　©　2019,　Science　Press.　All　right　reserved.