In　this　study,　the　LCA　assessment　model　of　CML　was　employed　to　analyze　the　environmental　burden　caused　by　the　production　of　glass　substrates,　and　the　evaluation　of　the　environmental　performance　of　five　stages　of　preparation　of　ingredients,　including　glass　melting,　precision　clarification,　overflow　molding　and　post　process,　was　also　conducted.　The　results　show　that　the　global　warming　potential　is　the　dominant　impact　category　in　the　comprehensive　environmental　burden　with　a　normalized　value　of　4.64×10-14,　followed　by　the　acidification　potential　(2.57×10-14),　photochemical　oxidation　potential　(2.82×10-15).　And　the　relative　contribution　of　abiotic　depletion　potential　and　human　toxicity　to　the　comprehensive　environmental　burden　is　rather　limited,　with　the　normalized　values　of　8.31×10-17　and　1.21×10-16,　respectively.　The　single　score　of　environmental　impact　due　to　the　whole　production　system　is　2.37×10-13,　wherein　the　environmental　impact　values　of　the　processes　of　preparation　of　ingredients,　glass　melting,　precision　clarification,　overflow　molding,　and　post　are　1.07×10-15,　9.10×10-14　(highest),　2.26×10-14,　7.36×10-14,　and　process　4.90×10-14,　respectively.　The　preparation　of　the　batch,　the　glass　melting,　the　overflow　molding　and　the　post　process　mainly　cause　the　environmental　effects　of　global　warming　potential　and　acidification　potential,　the　cumulative　values　of　which　are　1.13×10-13　and　9.01×10-14,　respectively.　The　precision　clarification　stage　mainly　causes　the　environmental　effect　of　acidification　potential,　the　value　of　which　is　2.02×10-14　and　much　higher　than　those　of　other　environmental　impact　categories.　©　2020　Trans　Tech　Publications　Ltd,　Switzerland.