The　effect　of　tempering　on　the　microstructure,　mechanical　properties　and　wear　resistance　of　cast　Fe-10wt.%Cr-1.5wt.%B-2wt.%Al　(referred　to　as　Fe-Cr-B-Al)　alloy　after　quenching　at　1100°C　has　been　investigated　in　the　present　study.　The　results　show　that　microstructure　of　tempered　Fe-Cr-B-Al　alloy　consists　of　tempered　martensite,　massive　ferrite　and　discontinuous　eutectic　borocarbide.　With　the　increasing　tempering　temperature,　the　retained　austenite　is　gradually　transformed　into　martensite.When　the　tempering　temperature　is　higher　than　450°C,　the　content　of　ferrite　in　the　matrix　increases　gradually,　however,　the　content　of　martensite　decreases　gradually.　There　was　no　significant　change　in　the　morphology　of　borocarbide.　With　the　tempering　time　(4-12　h)　and　tempering　cycle　increasing,　the　content　of　ferrite　in　the　matrix　increases　gradually.　When　the　tempering　temperature　is　lower　than　450°C,　the　hardness　of　Fe-Cr-B-Al　alloy　has　no　obvious　change.　With　the　increasing　temperature,　the　hardness　gradually　decreases.　The　hardness　of　Fe-Cr-B-Al　alloy　almost　reaches　the　highest　value　after　once　tempering　and　decreases　slightly　after　tempering　for　two　or　three　cycles.　With　the　extension　of　tempering　time,　it　is　beneficial　to　the　precipitation　of　carbide,　and　the　hardness　of　Fe-Cr-B-Al　alloy　increases　gradually.　When　the　tempering　time　is　too　long,　the　hardness　begins　to　decrease.　Fe-Cr-B-Al　alloy　has　excellent　wear　resistance　while　quenching　at　1100°C　and　tempering　at　450°C;　the　main　wear　mechanism　is　cutting　wear　and　ploughing　effect.