The　mechanical　rock　fragmentation　experimental　platform　of　Beijing　University　of　Technology　was　used　to　perform　linear　cutting　tests　on　Chongqing　sandstone　by　V　type,　constant　cross　section(CCS)　type　and　round　type　cutters.　Based　on　the　rock　breaking　phenomena　and　test　data,　the　influence　of　cutter　tip　type　on　rock-breaking　mechanism　and　efficiency　were　studied　from　the　aspects　of　cutter　force,　cutter　tip　stress,　specify　energy　and　muck　parameters.　The　applicability　of　different　cutter　types　was　discussed.　The　results　show　that　the　cutter　tip　type　parameters　can　affect　the　crack　propagation　pattern　within　the　rock　and　change　the　cutter　breaking　mechanism.　The　breakage　curve　of　the　round　type　cutter　increases　linearly.　The　contact　stress　of　the　cutter　tip　is　high,　and　the　cutter　force　is　relatively　low.　The　radial　crack　below　the　cutter　expands　sufficiently　to　form　triangular　rock　ships,　and　the　cutter　is　easier　to　intrude　into　the　rock.　But　the　loading　condition　of　the　round　type　cutter　is　not　good.　The　breakage　curves　of　the　CCS　type　cutter　show　a　power　function　growth　trend.　The　contact　stress　of　the　cutter　tip　is　not　so　high,　the　damage　range　to　the　rock　is　small　and　the　rock　chips　are　thin　and　flat.　However,　the　loading　condition　of　the　CCS　cutter　is　better　compared　with　the　round　type　cutter.　The　rock-breaking　performance　of　V　type　cutter　is　between　the　round　type　cutter　and　CCS　cutter.　Regardless　of　the　cutter　types,　as　the　penetration　rate　increases,　the　crack　propagation　extent　within　the　rock　increases　and　the　cutter　tip　contact　stress　tends　to　decrease.　For　the　Chongqing　sandstone,　the　round　type　cutter　has　the　lowest　specific　energy　and　the　best　rock-breaking　efficiency.　©　2023　Central　South　University　of　Technology.　All　rights　reserved.