High-carbon　high-speed　steels　(HSS)　are　very　abrasion-resistant　materials　primarily　due　to　their　high　hardness　MC-type　carbide　and　high　hardness　martensitic　matrix.　The　effects　of　quenching　and　tempering　treatment　on　the　microstructure,　mechanical　properties,　and　abrasion　resistance　of　centrifugal　casting　high-carbon　HSS　roll　were　studied.　Different　microstructures　and　mechanical　properties　were　obtained　after　the　quenching　and　tempering　temperatures　of　HSS　roll　were　changed.　With　air-cooling　and　sodium　silicate　solution　cooling,　when　the　austenitizing　temperature　reaches　1273　K,　the　metallic　matrix　all　transforms　into　the　martensite.　Afterwards,　the　eutectic　carbides　dissolve　into　the　metallic　matrix　and　their　continuous　network　distribution　changes　into　the　broken　network.　The　second　hardening　temperature　of　high-carbon　HSS　roll　is　around　793　K.　No　significant　changes　in　tensile　strength　and　elongation　percentage　are　observed　unless　the　tempering　temperature　is　beyond　753　K.　The　tensile　strength　increases　obviously　and　the　elongation　percentage　decreases　slightly　beyond　753　K.　However,　the　tensile　strength　decreases　and　the　elongation　percentage　increases　when　the　tempering　temperature　exceeds　813　K.　When　the　tempering　temperature　excels　773　K,　the　impact　toughness　has　a　slight　decrease.　Tempering　at　793-813　K,　high-carbon　HSS　roll　presents　excellent　abrasion　resistance.