The　concentration　and　chemical　speciation　of　volatile　organic　compounds　(VOCs)　was　quantitatively　analyzed　from　three　kinds　of　smoke,　which　were　the　fugitive　emissions　gas,　the　dust　removing　station　smoke,　and　the　coke　quenching　smoke,　respectively.　And　two　types　of　coke　oven　were　test,　which　were　top　charging　coke　oven　and　tamping　coke　oven.　In　addition,　Maximum　Increment　Reactivity　(MIR)　and　OH　loss　rate　(LOH)　was　used　to　quantify　the　ozone　formation　potential　(OFP)　and　reaction　activity　of　various　VOCs　species.　According　to　the　measurement　results,　the　concentration　of　VOCs　in　the　fugitive　emissions　reaches　to　hundreds　ppb,　and　the　VOCs　species　in　the　fugitive　gas　are　similar　between　top　charging　coke　oven　and　tamping　coke　oven.　Ethane,　ethylene,　benzene　are　the　major　VOC　species,　and　their　volume　fraction　percentages　are　22.7%　±　2.1%　and　24.2%　±　0.6%,　44.3%　±　1.9%　and　54.1%　±　2.0%,　14.3%　±　3.8%　and　7.3%　±　0.5%,　respectively.　Decane,　ethylene,　acetylene　are　the　major　VOC　species　in　the　dust　removing　station　smoke.　Their　volume　fraction　percentages　in　the　top　charging　coke　oven　and　tamping　coke　oven　are　6.5%　±　2.4%　and　20.3%　±　7.5%,　29.4%　±　3.3%　and　39.8%　±　4.2%,　31.6%　±　3.8%　and　15.0%　±　3.8%,　respectively.　In　the　coke　quenching　smoke,　decane　is　the　major　VOC　species,　and　its　volume　fraction　percentage　is　53.8%　±　6.3%.　The　alkenes　especially　ethylene　and　propene　in　the　fugitive　emissions　gas　and　the　dust　removing　station　smoke,　the　alkanes　especially　decane　in　the　coke　quenching　smoke　have　the　highest　ozone　formation　potential　in　the　coking　process.