On the basis of the theory of hyponymy in structural semantics,the present paper briefly analyzes the application of hyponymy in Chinese students’writing（non-English majored）.The author emphasizes that the theory of hyponymy has a potential textual function.It can not only lead students to realize the logical meaning in the text,but also help students to construct the logical relationship in a text.In this way,communicative competence of students can be greatly improved.