1. From the formal point of view, Preface to Mao Poetry is simple and scattered, and the system of Preface to Mao Poetry is comprehensive.
2. From the content point of view, Preface to Mao Poetry pays more attention to the angle of beauty and emphasizes the educational function of poetry. Preface to Mao Poetry pays more attention to the essence and function of poetry and emphasizes the emotional expression and artistic expression of poetry, which provides clues for the classification and understanding of ancient poetry art methods and plays a great role in promoting the development of poetry art in later generations.