Yi Autonomous Prefecture of Liangshan is the largest region inhabited by Yi People. There are many kinds of Cold Steel of Yi people including spear, boring cutter, long knife, short knife, dagger, huge log, huge stone, bows and arrows, helmet and armour, shield and so on. Researches of cold steel show that it＇ s numerous and diverse in types, unique in designs with cultural connotation, national characteristics and research values.