Generally speaking, doctrinal prose represents the top level and profound state of a nation`srationalspirit. In addition, the aestheticstandard of doctrine has always been a difficult problem of aesthetics. During the research on classic prose`s aesthetic category, we have found Yi Wei Idea, a theory with unique feature, providing a new path for the doctrinal aesthetics of classic prose. This shelteredcategory has never been mentioned in academic circles. The Yi Wei idea in aesthetics is the production of Yi Wei idea in Buddhism with Chinese characteristics. The Yi Wei idea in Buddhismhas accomplished the aesthetic transition from pure conceptual work to aesthetic pleasure through the famous metaphor of cane. The metaphor of cane in India contains a profound wisdom. The peel is the emblem of word and the juice is the emblem of doctrine. The juice and peel are integrated instead of equaled. Such idea utilizes the sweet taste of cane as a metaphor to illuminate the aestheticcourse of reading Buddhist scripture and elaborating the power of Buddha. The speech background of Yi Wei idea in WeiJin dynasty was the profound meaning of metaphysics and the connotation of expression. The realisticfoundation was the impetus of idle talk custom. The Yi Wei idea in Buddhism offers a reference for doctrinal aesthetics. This influence enriches the content of Chinese ancient aesthetics, deepens aesthetic thinking and becomes an aesthetic ideology of classic prose with Chinese feature. In Wei Jin dynasty, The Yi Wei idea was adopted as an evaluation criterion for characters and articles, which made us to think about the aesthetics of rational spirit and doctrine. In Song dynasty, new confucianists gave a keen characteristic of Confucian classics to classic prose`s Yi Wei idea. This idea focuses on the aesthetics of Internal Saints and External Kings, investigates the aesthetics ofConfucian living style and brought us new vision, thinking pattern and depth to classicprose aesthetics. The Wan Wei idea advocated by new confucianists in Song dynasty is a type of hermeneutics and reading theory with Chinese characteristics.