The Book of Songs with ＂its＂ there are many. According to the statistics of the classic ＂its＂ word appears in the 542 times in the three style of the Feng, Ya, and Song which every essay is involved. As the＂its＂word in fifteen Guofeng as the highest frequency of occurrence, there have been a total of 230, which the study TheBook of Songs and＂its＂complex word usage is important. This article focuses on the theBookof Songs and ＂their＂ word for pronouns, adverbs, expletive equivalents.