《诗薮》是明代重要诗歌理论著作,该书充分体现了胡应麟的诗歌流变观。辨体问题是中国古代诗歌研究的一个重要问题,也是胡应麟诗学理论的重点所在,对于了解胡应麟文学流变观具有重要意义。笔者以古体七言为例,对《诗薮》古体七言辨体之模糊性与概括性进行分析。 “Poetry 薮” is an important theory of poetry in the Ming Dynasty, the book fully reflects the changing view of poetry of Hu Yinglin. The distinguishing body is an important issue in the study of Chinese ancient poetry and also the key point of Hu Yinglin’s poetic theory, which is of great significance for understanding the changing view of literature of Hu Yinglin. The author uses the ancient Chinese seven words as an example to analyze the ambiguity and generality of the ancient seven - character differentiation of the poem.