The　microstructure,　hardness　and　wear　resistance　of　bainitic　steel　containing　1.0%-2.8%　Mn　were　investigated　by　means　of　optical　microscopy,　scanning　electron　microscopy,　energy　dispersive　spectroscopy,　x-ray　diffractometer,　hardness　tester　and　M-200　wear　tester.　The　results　show　that　the　as-cast　structure　is　mainly　composed　of　pearlite　and　a　small　amount　of　bainite　when　the　Mn　content　is　less　than　1.6%.　When　the　Mn　content　reaches　2.2%,　the　as-cast　steel　is　mainly　composed　of　acicular　lower　bainite　and　retained　austenite.　With　the　increase　in　Mn　content,　the　amount　of　retained　austenite　decreases,　the　acicular　lower　bainite　content　increases,　and　the　hardness　tends　to　increase.　After　normalizing　at　900　degrees　C,　the　microstructure　of　the　steel　is　mainly　acicular　lower　bainite　and　filmlike　retained　austenite.　As　the　Mn　content　increases,　the　bainitic　transformation　curve　moves　to　the　right　and　down,　the　bainitic　transformation　start　temperature　(Bs)　decreases,　the　bainitic　laths　are　more　refined,　the　retained　austenite　content　is　reduced,　and　the　hardness　is　increased.　The　wear　resistance　of　normalized　bainitic　steel　increases　obviously　with　the　increase　in　Mn　content.