During　the　abrasive　wear　process　of　Fe-B　alloy,　the　Fe2B　resists　the　abrasive　and　protects　the　matrix　from　being　shoveled　off;　in　return,　the　matrix　supports　the　Fe2B　against　fracture.　Therefore,　there　is　a　need　to　characterize　the　effect　of　matrix　on　the　abrasion　resistance　of　Fe-B　alloy.　Two-body　abrasive　wear　tests　of　as-cast　Fe-B　alloys　with　various　matrix　contents　are　performed　on　a　pin-on　disk　tribometer　at　the　normal　load　ranging　from　7　N　to　30　N.　At　the　load　of　7　N,　the　abrasion　resistance　of　Fe-B　alloy　increases　with　increased　Cu　and　Ni　contents,　especially　for　the　high　Cu　and　Ni　additions　(namely,　the　V-m/V-p　becomes　greater　than　3.7　(where　the　V-p　and　V-m　show　the　volume　fractions　of　pearlite　and　martensite,　respectively)),　and　the　wear　mechanism　changes　from　micro-ploughing　to　micro-cutting.　Nevertheless,　the　abrasion　resistance　of　Fe-B　alloy　decreases　with　the　increase　of　normal　load.　At　the　same　time,　the　wear　mechanism　changes　from　micro-cuffing　to　a　mixed　mode　of　micro-cutting　and　micro-ploughing.　The　wear　mechanism　of　Fe-B　alloy　can　be　described　as　follows:　with　the　decrease　of　V-m/V-p　or　the　increase　of　normal　load,　the　M2B-type　boride　will　be　crushed　by　a　perpendicular　force　F-perpendicular　to　owing　to　a　high　degree　of　deformation,　and　the　broken　M2B　debris　will　be　eradicated　and　dislodged　by　the　Al2O3　abrasives,　then　the　abrasion　resistance　of　Fe-B　alloy　will　be　reduced　greatly.　Accordingly,　it　has　been　proven　that　the　Fe-B　alloy　with　martensite　matrix　or　high　V-m/V-p　matrix　can　be　effectively　subjected　to　severe　abrasive　wear　in　a　low　contact　stress.