Literature theory is a subject that studies literary phenomena and literary works. It aims to explore the nature of literature, the origin of literature, the creation of literature, and the role of literature. Literature theory mainly studies the following aspects: The origin and evolution of literature: to explore the origin, development and evolution of literature, including the relationship between the origin of literature and religion, politics, culture and other aspects. 2. The nature and characteristics of literary works: analyze the nature and characteristics of literary works, including the type, theme, language, style and other aspects of literary works. 3. Methods and techniques of literary creation: The study of literary creation methods and techniques includes the basic elements of literary creation, the creation process, and the creation strategy. 4. The role and influence of literature: to explore the influence and role of literature on human society and culture, including the influence and role of literature on society, politics, culture and other aspects. The theory of literature is a comprehensive subject, which aims to conduct in-depth research on literary phenomena and provide theoretical support and guidance for literary creation and evaluation.