There　are　differences　in　the　rock-breaking　ability　of　drilling　teeth　in　various　types　of　formations,　which　is　also　the　reason　for　the　low　rate　of　penetration　(ROP)　of　some　drilling　tools.　Studying　the　rock-breaking　characteristics　and　energy　conversion　law　of　rocks　impacted　by　different　polycrystalline　diamond　compact　(PDC)　irregular　teeth　is　of　great　significance　to　improving　the　compatibility　of　drill　teeth-rock　in　percussive　drilling.　In　this　study,　the　dynamic　rock-breaking　test　on　rocks　with　different　physical　and　mechanical　properties　(granite,　grey　sandstone,　red　sandstone)　were　conducted　using　the　SHPB　system　installed　with　PDC　irregular　teeth　(triple-rigid　and　axe　teeth).　The　approximate　range　of　strain　rate　during　impact　is　50　s-1　to　150　s-1.　On　this　basis,　the　drillability　value　and　dynamic　compressive　strength　of　different　rocks　are　calculated,　the　impact　volume　of　rock　after　penetration　is　analyzed,　the　energy　transfer　efficiency　eta　and　rock-breaking　specific　energy　delta　of　rocks　impacted　by　PDC　irregular　teeth　are　discussed,　and　the　drill　tooth-rock　compatibility　under　impact　load　is　revealed.　The　results　show　that　the　size　of　the　impact　crater　is　closely　related　to　the　impact　velocity　and　compression　strength　of　the　rock.　With　the　increase　of　impact　velocity　and　rock　strength　(the　strength　of　granite　is　the　highest,　grey　sandstone　is　the　second,　and　red　sandstone　is　the　lowest),　the　volume　of　impact　crater　increases　gradually.　Furthermore,　the　shapes　of　impact　craters　produced　by　different　teeth　also　vary,　depending　on　the　tooth　shape.　With　the　continuous　rise　of　impact　velocity,　the　penetration　depth　l,　damage　area　S,　and　damage　volume　V　of　impact　craters　produced　by　different　teeth　all　increase　continuously.　Meanwhile,　the　penetration　depth,　damage　area,　and　volume　of　craters　produced　by　triple-rigid　teeth　are　about　2,　1.5,　and　3.5　times　those　of　the　axe　tooth.　The　axe　tooth　exhibits　higher　energy　transfer　efficiency　and　rock-breaking　specific　energy　than　the　triple-rigid　tooth　during　the　impact　loading.　In　terms　of　drilling　bit　optimization,　axe　teeth　are　more　suitable　for　hard　formations　when　triple-rigid　teeth　are　better　for　soft　formations.　The　findings　were　expected　to　form　the　basis　for　the　selection　of　drilling　teeth　type　and　the　optimization　of　drilling　tool　engineering　parameters　in　the　percussive　drilling　process.