The Tang Dynasty experienced a prosperous period from the early days when the world was just established to dominating China, and reached the glorious period of feudal society in China, rising to an unprecedented height, showing a thriving scene. Enlightened and prosperous national politics and economy, as well as strong military strength, are the fundamental reasons for the formation of frontier fortress poems in the prosperous Tang Dynasty. At the same time, the new ideal of the times constantly changed the aesthetic taste of the Tang society, making it the internal driving force of artistic evolution. For example, the poetry innovation movement advocated by Chen Ziang, the four outstanding figures in the early Tang Dynasty, promoted and promoted the development of literary thought. In addition, people in the prosperous Tang Dynasty looked forward to the future and longed for an extraordinary life, which was unmatched by any dynasty. In addition, it is also related to the needs of the evolution of poetry itself. On the one hand, in the form of poetry, the spirit of modern poetry occupies a dominant position, on the other hand, it is necessary to realize the reversal of the vigorous style of writing in the Six Dynasties in order to show the magnificent spiritual realm of poetry in the prosperous Tang Dynasty. The former is the inheritance of the Six Dynasties, while the latter is the reverse backwash. In the early Tang Dynasty, while accepting the metrical style of modern poetry, it showed a process of backwashing the magnificent poetic style of the Six Dynasties. This backwash is first manifested in the intentional pursuit of magnificent poetic style. From this point of view, frontier fortress poetry is not only an external manifestation of the vast territory of the Tang Dynasty, but also a powerful weapon for poetry in the early Tang Dynasty and the prosperous Tang Dynasty to criticize aestheticism. All of the above shows that the early Tang poetry laid the foundation for the voice of the prosperous Tang Dynasty.