With　development　of　the　economic,　China　has　been　the　largest　cement　production　country　in　the　world.　But　the　big　production　of　cement　also　causes　serious　ecological　environmental　problems.　In　this　study,　a　cradle-to-gate　life　cycle　assessment　was　carried　out　for　four　typical　cement　factories　in　China.　The　results　indicated　that　new　suspension　preheater(NSP)　process　and　power　plant　were　mainly　to　blame　for　most　emissions　and　environmental　performances,　and　GWP　is　the　most　prominent　category　in　the　accumulative　environmental　performance　of　cement　production.　Any　of　the　strategies　for　cleaner　production　of　cement　considered　in　this　study,　including　larger　production　scale,　cogeneration　and　using　calcium　carbide　slag　as　secondary　material,　has　effect　in　improving　the　environmental　performance,　but　the　final　single　result　show　that　the　utilization　of　calcium　carbide　slag　is　the　best　method,　and　it　could　reduce　the　environmental　impact　obviously.　©　2017　Trans　Tech　Publications,　Switzerland.