Fe-B-C　wear-resistant　alloy,　as　a　new　type　of　iron-based　wear-resistant　materials,　has　drawn　extensive　attention　of　the　researchers　in　materials　at　home　and　abroad.　The　boron　concentration　plays　an　important　role　in　the　microstructure　and　mechanical　properties　of　Fe-B-C　wear-resistant　alloy.　In　this　paper,　the　solidification　microstructure,　volume　fraction　of　eutectic,　macro　and　micro　hardness　of　Fe-B-C　alloy　are　researched.　The　samples　are　measured　by　optical　microscopy　(OM),　scanning　electron　microscopy　(SEM),　Rockwell-hardness　tester,　Vickers-hardness　tester.　Image　processing　software　such　as　image-pro　and　photoshop　are　used.　The　content　of　boron　in　experiment　alloys　are　1.0%,　1.5%,　2.0%,　2.5%　and　3.0%　respectively.　As　a　result,　the　solidification　microstructure　of　as-cast　Fe-B-C　mainly　consists　of　metallic　matrix　and　eutectic　structure.　The　eutectic　phase　is　continuous　netlike　distribution　along　the　grain　boundary.　As　boron　concentration　increases,　the　volume　fraction　of　borocarbide　increases　in　the　matrix,　and　the　size　is　larger.　The　hardness　of　Fe-B-C　also　has　a　tendency　to　rise　with　the　increase　of　boron　concentration.