文学建构是文学主题显现的关键。本文从文本解读入手,探讨大冈升平《俘虏记》中的四组二重性建构。作品主题是拷问人性真实和追究人类自身存在之危机感。二重性建构对主题的显现和深化起到关键性作用,也是作品文学魅力所在。 Literary construction is the key to the emergence of the theme of literature. This article begins with the interpretation of the text and explores the four groups of duality constructions in “Captured Persons” written by Okawa Ryohei. The theme of the work is to examine the true nature of human nature and investigate the sense of crisis in the existence of mankind itself. The construction of duality plays a key role in the appearance and deepening of the theme, and is also the charm of the literary works.