Abstract: This paper introduces the basic principle, process factors, experimental resuls and so on ofproduction of high-carbon graphite by chloridizing roast with natural fine-scale graphite as samlpes. Thechloridizing roast can upgrade the graphite with carbon from 86. 09% to 98. 76 %. It is proved that preduction of high-carbon graphite by chloridizing roast is better than by alcali.