Abstract: Eight-part essay is special genre for imperial examinations in Ming and Qing Dynasties when literates used several sentence patterns creatively in texts. The appropriate use and flexible collocation don't only render the essays and make them unrestrained, but also contribute to repeated use of Chinese rhythms, so as to present unique rhythm of sentence patterns. This paper focuses on analyzing rhythmic characteristics of "parallel prose sentences", "long and short sentences" as well as "paired sentences" in Eight-part essay according to Wu Jiemin's "theory about repetition of Chinese rhythms". The purpose is to provide some evidence and research ideas for the rhythm research. Additionally, we should take the essence and abandon the dregs, critically inheriting the writing method of the Eight-part essay. Only then the charm of the ancient Chinese written language in the Eight-part essay could be valued and developed.