本文以“自由与道德”关系为研究切入点 ,依照“自由本体与道德意识的理论关联”、“自由观演变与伦理结论转化的互动关联”两条主要理论纲要 ,对萨特现象学本体论与伦理学说的内在联系、自由观与伦理结论的互动转化作出了准确深刻的探析 ,从哲学观上揭示了萨特道德哲学的理论构建、理论定位、理论困境、转向及其科学出路 In this paper, the relationship between freedom and morality is taken as the breakthrough point. According to the two main theoretical frameworks of “the theoretical connection between free ontology and moral consciousness” and “the interactive relationship between the evolution of liberty and the transformation of ethical conclusion” And the inner linkages of ethics, the interaction between freedom and ethics has made an accurate and profound exploration, and from the philosophical point of view, it has revealed the theoretical construction, theoretical orientation, theoretical predicament, shift and scientific approach of Sartre’s moral philosophy