The poetry system in the Tang Dynasty is diverse, and the whole China classical poetry after the Song Dynasty is not within its scope. Ancient poems in Tang Dynasty can be lyrical, narrative and argumentative. Due to the influence of modern poetry, the ancient poems in Tang Dynasty were either integrated into metrical sentences or deliberately opposed to metrical sentences, which was different from the purity of ancient poems before Jin and Song Dynasties. In the early Tang Dynasty and the Five Dynasties, it still inherited the variant of Qi and Liang Dynasties, which was transformed by Chen Ziang, developed by Zhang Jiuling and Li Bai, and finally flourished in Du Fu. Seven-character unconventional songs and ancient poems are in parallel with the traditional songs which are refined and accurate and tend to be legalized. Yuefu is a special kind of classical poetry. Many Yuefu in the Tang Dynasty broke up in discord, or borrowed old inscriptions to write new ideas, or set up new ones to remember new ones. Li Bai, Du Fu, Yuan Zhen and Bai Juyi achieved the highest results. The Five-Seven Rhythm is a new poetic style in the Tang Dynasty. After Wang Ji and four outstanding figures in the early Tang Dynasty, the Five Laws finally realized the system standardization in Shen Song. The Seven Laws rose late, and the authors were Shen, Song and Du. Through the development of Wang Wei, Gao, Cen and others, Du Fu's realm has been greatly expanded. Since then, the five-seven-character method has developed in parallel. Ten talented people in Dali, Jia Dao, Yao He, Xu Hun, Zhao Wei, etc. They are all famous legal scholars. In the late Tang Dynasty, the beauty of timbre and language skills of Li Shangyin's Seven Rhymes developed to a more mature stage. Metric poems have rhythmic lines, and most writers tend to blow their own horn. There are few excellent works. Du Fu's local arrangement and writing of major themes are neat and beautiful, and his achievements are very high.