"Ke Zhi Er Bi" are achievements of Yi people' s knowledge and experience tempered and accumulated for a long time.They are also folk literature language."Ke Zhi" is closely connected with" Er Bi",and it cant' work without the other.Yi people' s "Ke Zhi Er Bi" are gradually formed and developed with human language' s emergence.They have rich thoughts and special language art,and they spread over the folk.The language materials of " Ke Zhi Er Bi" not only have high literary value,but also are very precious materials to the research into Yi people' s history."KeZhi ErBi"can play the role to communicate and improve the relationship,to educate the descendant,to encourage and comfort people.