Bamboo　fiber　reinforced　resin　matrix　brake　materials　were　selected　as　research　object,　dry　and　wet　friction　experiment　was　conducted　on　MM200　abrasion　tester.　Results　show　that:　friction　coefficient　drops　down　to　a　very　low　level　under　wet　condition,　wear　rate　of　samples　and　counterparts　also　decreases,　but　the　values　of　friction　coefficient　are　still　in　the　range　of　dry　friction.　Under　dry　and　wet　conditions,　the　tribilogical　performance　of　sample　has　different　relationships　with　the　pressure　and　speed,　especially　with　the　speed.　Friction　surface　was　lubricated　and　cooled　by　water,　in　the　meantime,　the　formation　of　friction　film　is　suppressed,　which　leads　to　the　differences　of　the　tribilogy　performance　between　dry　and　wet　conditions.　Morphologies　of　fricion　surface　was　observed　by　SEM,　worn　surface　in　wet　braking　was　not　covered　by　friction　film,　many　fine　cracks　and　some　patches　were　scattered　over　the　substrate.　©　(2012)　Trans　Tech　Publications,　Switzerland.