The　present　work　studied　the　critical　control　of　foam　insulation　materials　produced　by　waste　TFT-LCD　glass.　The　result　showed　that　foam　glass　was　affected　by　sintering　temperature,　as　well　as　other　factors　such　as　foaming　agent,　oxygen　supply　agent　and　reaction　time.　The　ordinary　waste　glass　was　used　to　drop　the　melting　temperature　of　Waste　TFT-LCD　glass.　The　density　of　foam　glass　had　a　down-up　trend　with　the　increase　of　sintering　temperature.　The　increase　of　ratio　of　foaming　agent　and　oxygen　supply　agent　led　to　a　notable　decrease　of　the　density,　while　the　change　of　reaction　time　exerted　an　unobvious　influence　on　the　density.　The　density　of　foam　glass　produced　under　the　optimal　conditions　was　0.2211　g/cm(3).