在中国古代 ,“名”是名学的主要研究对象 ,“字”是小学的主要研究对象 ,两者虽分属于不同学科 ,却有着十分紧密的内在联系。本文从先秦诸子有关“名”的理论入手 ,首先着力探析“名”“字”关系 ,以求辨明两者的同异。然后在此基础上 ,以荀子《正名》篇为重点 ,从名字合一的角度重新审视“约定俗成”的含义 ,并着重阐发“名无固宜”和“名有固善”的深刻理论意义 In ancient China, “name” is the main object of study of Ming Dynasty. “Word” is the main object of study in primary schools. Although both belong to different disciplines, they have a very close internal connection. This article starts with the theory of “name” of pre-Qin philosophers, and first tries to analyze the relationship between “name” and “character” in order to find out the similarities and differences between the two. Then on the basis of that, taking Xunzi’s “Zheng Ming” as its focus, it re-examines the meaning of “conventions” from the perspective of the unity of names and focuses on the profound theoretical significance of “name is not suitable” and “celebrity is good”