The Xianguai School of Poetry was a school in the history of ancient Chinese literature that originated from the Tang Dynasty and developed into the Song Dynasty. The poets of this school were famous for writing absurd, bizarre and grotesque poems. The content of their poems often expressed various absurd and strange phenomena of human beings, as well as their exploration and thinking of these phenomena. The poetry style of the Xianguai School was unique and rich in language. It often used symbols, metaphor, antithesis and other rhetorical devices to achieve the purpose of expressing the theme and emotion of the poem. The representatives of this school of poets were Li Yishan, Wang Zhihuan, Liu Yuxi, etc. The Xianguai School of Poetry occupied an important position in the history of ancient Chinese literature. Its unique poetry style reflected the living conditions and cultural background of the Tang and Song Dynasties, and also had a profound impact on the poetry creation of later generations.