Based　on　life　cycle　assessment　(LCA),　a　quantitative　analysis　and　evaluation　of　resources　consumption,　energy　consumption　and　pollutant　emissions　caused　by　windows　production　were　carried　out.　The　result　shows　that　AP,　POCP　and　GWP　are　the　main　contributors　of　the　total　environment　burden　of　windows　production　process,　and　the　proportion　is　almost　97%.　At　the　stage　of　windows　parts　production,　the　main　environmental　pressures　of　windows　production　process　are　from　windows　profiles　and　glass　production　process.　The　result　shows　that　the　key　of　the　windows　production　energy-saving　are　the　windows　profiles　and　glass　production　process.