关键词: 康德, 道德形而上学, 分析法, 综合法

Abstract: There are two reasoning methods, namely the analytical method and the synthetical method, which are important for the construct of Kant's moral metaphysics. By the analytical method, he abstracted firstly the pure moral phenomena and principle from the common tangly moral understanding in order to lay a foundation to the real moral philosophy. Then he guaranteed the substantiality of moral law and applied it to the experiencial world by synthetica method, so as to argue that moral principle was not the subjective fabrication. The two methods rely on each other and sustain the edifice of moral metaphysics.

Key words: Kant, moral metaphysics, analytical method, synthetical method