关键词: 正义, 自由, 实践理性, 善良意志, 道德基础, 存在

Abstract: Kant's philosophy of morality is consistent withhis political philosophy. He thought that the priority of justice results from the inborn freedom ofhumanity, while that the free subject sticking to justice and morality is because of the good will which lies in the practical reason . Kant thus settle a basefor morality through these concepts including freedom, practical reason, good will, etc. But it is still innate and hollow. Only starting with the root point that morality is our pattern of existence can we understand morality and get itsexistence a substantial foundation.

Key words: Justice, Freedom, Practical reason, Good will, Moral base, Existence