Abstract: Xunzi not only consented the nature of people is good on the distinction between human and birds and beasts,but also saw the possibility of knowledge promotes good in moral education in analysis practice of pure nature and knowledge,kind and justice,and thinking ability of people.Although Xunzi and Mencius had a different point of view in the theory of human nature,they had the same point of view in the concept of virtue that man could be educated.Mencius explored the human virtues potential inward and affirmed the initiative of the moral practice,which provides preconditions of his moral self-cultivation.Xunzi expanded human virtue ability outward,which established a solid foundation for the possibility of moral education.