Based　on　life　cycle　assessment,　analysis　of　energy　consumption　and　other　environment　load　by　steel　production　in　Chinese　typical　iron　and　steel　industry　was　carried　out.　The　process　accounted　for　the　most　environment　load　was　found　by　studying　the　different　processes　in　steel　production　route.　The　results　indicate　that　the　most　important　process　is　blast　furnace(BF)　which　is　the　major　factor　of　CO2　and　CO　emissions,　and　contributes　most　to　globe　warming　potential　(GWP)　and　photochemical　ozone　creation　potential　(POCP).　©　(2014)　Trans　Tech　Publications,　Switzerland.