A　new　type　of　heat-resistant　borosilicate　glass　was　designed　based　on　waste　TFT-LCD　glass　raw　materials.　Aiming　at　the　difficulty　in　clarification　of　the　heat-resistant　glass,　which　leads　to　a　large　amount　of　bubbles　in　the　glass,　the　effects　of　four　clarifying　agents:　CeO2　,　NaCl,　Na2　SO4　and　SnO2　on　the　clarification　quality　of　the　heat-resistant　glass　were　studied　by　high　temperature　video　research　method　of　glass　batch.　The　experiment　observed　the　clarification　process　of　glass　melt　through　a　high-temperature　video　system.　The　results　show　that　at　the　melting　temperature　of　1　600　℃,　the　best　clarification　effect　is　achieved　when　the　addition　amount　of　NaCl　and　Na2　SO4　were　added　as　a　single　clarifying　agent　at　0.　50%　(mass　fraction)　and　0.　20%　(mass　fraction),　respectively.　The　best　clarification　effect　is　achieved　when　the　addition　amount　of　clarifying　agent　combining　CeO2　and　SnO2　with　NaNO3　is　0.　40%　(mass　fraction)　CeO2　+　2.　60%　(mass　fraction)　NaNO3　and　0.　40%　(mass　fraction)　SnO2　+　2.　40%　(mass　fraction)　NaNO3　.　The　time　for　the　glass　melt　foam　to　start　falling　back　is　22,　10,　20　and　28　min,　respectively.　The　initial　falling　temperatures　are　1　110,　1　050,　1　103　and　1　143　℃,　respectively.　Under　the　optimum　holding　time,　the　clarification　effect　is　best　with　0.　50%　(mass　fraction)　NaCl.　©　2022　BULLETIN　OF　THE　CHINESE　CERAMIC　SOCIETY.　All　rights　reserved.