The　effects　of　forging　and　heat　treatment　on　microstructure　and　properties　of　high　boron　white　cast　iron　were　investigated　in　this　paper.　The　results　show　that　forging　breaks　up　boride　network　and　makes　broken　boride　particles　uniformly　distributed　in　matrix.　During　subsequent　heat　treatment,　spheroidized　boride　is　able　to　be　obtained.　The　hardness　of　high　boron　white　cast　iron　increases　slightly　(from　51.4　HRC　to　54.7　HRC)　while　the　toughness　increases　obviously　(from　5　J/cm(2)　to　107　J/cm(2))　by　combined　process　of　forging　and　heat　treatment.　Fracture　morphology　changes　from　brittle　fracture　to　ductile　fracture.