本文对实践伦理学的产生的历史背景、发展状况、学科性质、理论地位、研究对象和子学科分类进行了阐发,提出萌芽于20、30年代,发展于70、80年代的实践伦理学,是继产生于19世纪末,20世纪初的描述伦理学和20世纪初至60、70年代的元伦理学之后的西方伦理学理论的第三个分化;提出实践伦理学的学科性质就在于它的边缘性、综合性和应用性;提出实践伦理学以由于社会生活特别是科学技术的飞速发展所带来的急剧变动所引起的前所未有的道德境遇中面临到的以地域性或民族性体现出来的全球性道德问题为对象。 This essay expounds the historical background, development status, subject nature, theoretical status, research object and sub-discipline classification of practical ethics, and puts forward the practical ethics that sprouted in the 1920s and 1930s and developed in the 1970s and 1980s. Resulting in the third division of western ethics theory after the end of the 19th and early 20th century and ethics after the meta-ethics of the early 1960s and 1970s. The discipline nature of practical ethics lies in its marginalization , Comprehensiveness and applicability; Put forward the practice of ethics due to the rapid changes brought about by the rapid development of social life, especially the rapid development of science and technology brought about by the unprecedented moral situation faced by the regional or nationality embodied in the global Moral issues as objects.