Kazuo Ishiguro, winner of the 2017 Nobel Prize in literature, is one of the most famous novelists in contemporary British literature. In his novel Never Let Me Go, the author constructs a post-human society, that is, a world of human cloning that transplant organs for human. This paper mainly explores the details of life in the post-human’s tragic fate, and reveals the ethical dilemma faced by the post-human, and triggers readers to think about the ethical fetters between human and post-human.