《乐记》作为中国古代很早的音乐美学论著，对音乐的产生、礼乐与社会自然的关系、礼乐的功用异同等作了精辟而深刻地论述，本文拟就其内容本体、学术源流与所受的时代思潮两个方面，浅论其所含的“天人合一”思想。《乐记》一书据《汉书·艺文志·文艺略》载有二十三篇。现被 As a very early musical aesthetic treatise in ancient China, “Yue Ji” makes a brilliant and profound exposition on the similarities and differences between the production of music, the relationship between ritual music and social nature and the function of ritual and music. This paper intends to discuss its content ontology, And the ideological trend of the times, it discusses the thought of “harmony between man and nature” contained in it. “Book of Music,” a book according to “Han Yi Wen Zhi slightly” contains twenty-three. Now is