Bai Juyi was a famous writer and politician in the Tang Dynasty. His literary theory was known as the "New Yuefu" or "Bai Juyi's literary theory". Bai Juyi's literary theory advocated taking nature as the object of study. He believed that literature should imitate nature to express the truth and beauty of human nature. He believed that nature was the soil of human life and the source and foundation of literature. He advocated that in literature, the truth and beauty of human nature should be expressed through true descriptions and deep thinking, expressing people's pursuit and recognition of the values of life, love, friendship, justice, etc. In addition, Bai Juyi's literary theory also emphasized the relationship between literature and society. He believed that literature should reflect social reality, pay attention to social hot topics and people's livelihood issues, and provide people with valuable ideas and cultural products. Bai Juyi's literary theory had an important influence on the development and prosperity of Chinese literature, and also provided important reference and guidance for later literary creation.