《沙乡年鉴》是美国作家奥尔多•利奥波德的代表作，也是环境文学的经典著作之一。利奥波德在书中所提出的环境保护思想，“大地伦理”，更是极大地影响了美国的环境保护运动。然而对“大地伦理”在哲学上的合理性学界一直存在不少质疑和批评。本文试图从叙事的角度研究本书中的“大地伦理”主题，分析利奥波德如何在本书中构建了详细解释“大地伦理”和证明其合理性的叙事。本文在对《沙乡年鉴》的文本进行分析之前，首先简要介绍了环境文学的主要特点和叙事在生态批评领域中的角色。然后，进行作品本身的分析，分析主要围绕两部分的叙事进行：以年鉴形式呈现的沙乡故事叙事和以素描形式呈现的地质特景叙事。在对其进行分别分析之后，再将二者结合在一起探讨从叙事上看“大地伦理”这一主题在全书中的连贯性和统一性。总结前面分析的结果，本文得出了结论：叙事分析能够为读者理解“大地伦理”思想提供一定的帮助，并且从一定程度上针对批评和质疑做出了合理的辩护和说明。因此，在人们寻求改善人与自然关系的途径时，更好地理解“大地伦理”思想具有重要的指导意义。

As the representative work of Aldo Leopold, A Sand County Almanac is considered a classic of environmental literature and has been revered as a holy book in conservation circles, especially for Leopold’s conservation ideas, the land ethic. However, many criticisms are leveled against the philosophical justifiability of the land ethic. This thesis intends to study the land ethic theme of the work from a narrative perspective, which integrates the narration with the almanac stories and landscape sketches, to display how a narrative is constructed to elaborate and justify the land ethic. In this thesis, an introduction of environmental literature and narrative’s place in Ecocritical field comes before the analysis of A Sand County Almanac as a clue. In analyzing the work itself, the narrative of almanac stories and that of landscape sketches are studied respectively and then the thematic unity of the work is examined in accordance with it. And it is to find out that whether the narrative reading of the book helps to understand the land ethic and could temper those criticisms which leveled against it to some extent. Therefore, it will hopefully contribute to the future study of this work so far as land ethic keeps on inspiring us in addressing man-nature relationship.