Two-body　abrasive　wear　behavior　and　mechanism　of　Fe-B　alloys　with　different　Mo　contents　have　been　systematically　investigated.　The　results　show　that　the　Mo　addition　can　promote　the　formation　of　Mo-rich　and　Cr-rich　M2B　in　Fe-B　alloys,　and　the　Mo-rich　and　Cr-rich　M2B　possess　the　higher　H　(hardness)　and　delta(A)　(plasticity　factor)　compared　to　the　Fe-rich　M2B.　Meanwhile,　with　the　increase　of　Mo　content,　the　VMo+Cr/V-Fe　increases　slightly　firstly　and　then　increases　rapidly　(Where　the　V-Mo,　V-Cr　and　V-Fe　represents　the　volume　fractions　of　Mo-rich,　Cr-rich　and　Fe-rich　M2B,　respectively,　and　the　VMo+Cr　shows　the　volume　fractions　of　V-Mo　and　V-Cr).　The　wear　results　reveal　that　the　wear　rate　decreases　greatly　with　the　increasing　VMo+Cr/V-Fe　especially　when　the　VMo+Cr/V-Fe　＜　0.42.　During　the　two-body　wear　process,　the　main　wear　mechanism　is　microcutting,　and　the　Mo-rich　and　Cr-rich　M2B　provide　better　resistance　to　the　SiC　abrasive　relative　to　the　Fe-rich　M2B.　In　this　case,　the　increasing　VMo+Cr/V-Fe　induced　by　the　Mo　addition　contributes　to　the　improvement　of　the　abrasion　resistance　of　Fe-B　alloys　effectively.