The　environmental　impacts　of　cement　production　using　two　pre-drying　processes,　i.e.,　coal-fired　pre-drying　process　and　pre-drying　process　by　waste　heat　from　kiln　tail　process　were　analyzed　and　compared　through　life　cycle　assessment　(LCA).　The　results　show　that　the　energy　consumption,　global　warming　potential　(GWP),　acidification　potential　(AP),　photochemical　creation　potential　(POCP),　human　toxicity　(HT)　and　eutrophication　potential　(EP)　of　pre-drying　process　by　waste　heat　from　kiln　tail　are　about　1%,　2%,　5.2%,　5%,　3.5%　and　3.8%　lower　than　coal-fired　process;　therefore　the　application　of　pre-drying　process　by　waste　heat　from　kiln　tail　has　obvious　environmental　benefits.