The　authors　put　forwarded　technical　approaches　for　suppressing　smoke　emitted　from　the　polyvinyl　chloride　(PVC)　in　burning　and　briefly　summarized　the　smoke　suppressants　available　for　PVC　and　their　action　mechanism.　Molybdenum　compounds,　boron　compounds,　tin　compounds,　and　zinc　oxide-magnesium　oxide　complex　are　usually　deemed　as　the　main　smoke　suppressants　suitable　for　PVC.　In　general,　adding　2-4　phr　of　one　of　the　smoke　suppressants　can　reduce　the　smoke　generation　by　over　30%　and　therefore,　considerably　facilitate　the　improvement　in　flame　retardance　of　the　materials.