Bai Juyi's thought combines Confucianism, Buddhism and Taoism. Self-reliance, with Confucianism as the guiding ideology, "wealth will help the world, and poverty will be immune to it." His ambition of "helping the world and the people" is mainly based on Confucian benevolent policies, including the theory of Huang Lao, the technique of treating filial piety and the method of applying Korea; His mind of "being alone" absorbed the concepts of contentment, uniformity and freedom of Laozi and Zhuangzi and the Buddhist thought of "liberation". The two are roughly bounded by Bai's demotion of Jiangzhou Sima. Bai Juyi not only left nearly 3000 poems, but also put forward a whole set of poetry theory. He compared poetry to a fruit tree and put forward the viewpoint of "root feeling, Miao character, Watson and true meaning" (nine books are the same). He believes that "emotion" is the fundamental condition for the emergence of poetry, "those who touch people's hearts should not care about emotion first" (ibid.), and the emergence of emotion is related to current politics because of emotion. Therefore, poetry creation cannot be divorced from reality, but must be based on various events in real life and reflect the social and political situation of an era. He inherited the tradition of "beauty and beauty" since the Book of Songs and attached importance to the realistic content and social function of poetry. Emphasize the role of poetry in exposing and criticizing political abuses. He put forward a series of principles in poetry expression:
"Concise";
"Call a spade a spade, cut to the chase", express one's mind directly and be close to the facts;
"Things are true", the content is true and well documented;
"The body is smooth and smooth" and the words are smooth and easy to sing (Preface to New Yuefu).
His poetic theory is of progressive significance for urging poets to face up to reality and care about people's livelihood. It also has an important influence on the poetic style that has gradually emphasized form since Dali (766 ~ 779). However, overemphasizing the subordination of poetry creation to the needs of real politics will inevitably constrain the artistic creation of poetry and the diversification of poetry styles.