In　order　to　study　the　crack　modes　of　Beishan　granite　under　the　indentation　of　a　single　disc　rolling　cutter,　a　series　of　linear　cutting　experiments　are　conducted　on　the　Mechanical　Rock　Fragmentation　Experimental　Platform　developed　by　Beijing　University　of　Technology.　During　the　experiment,　a　constant　cross-section　disc　cutter　with　a　diameter　of　17　inches　(432　mm)　is　used　and　a　block　of　Beishan　granite　with　the　size　of　1000×1000×600　mm　is　adopted.　After　the　tests,　it　is　found　that　there　is　a　cracked　part　beneath　the　groove　with　varied　fragmentation　degree.　Based　on　the　observed　crack　mode　and　crack　density,　the　rock　sample　is　classified　into　re-compacted　zone,　crushed　and　cracked　zone　and　intact　rock　zone,　then　the　sizes　and　areas　of　these　zones　are　summarized　accordingly.　Meanwhile　the　ultrasonic　velocity　tests　and　rebound　tests　are　conducted　to　obtain　the　properties　of　different　zones.　Finally,　it　is　found　that　these　test　results　agree　well　with　the　fragmentation　degrees　of　different　zones.　In　addition,　as　the　time　of　cutting　increases,　the　areas　of　these　zones　expand　significantly,　while　the　properties　of　the　corresponding　zones　almost　keep　constant.