对形声字“形”的表义特点学者们已经达成共识 ,而往往忽视了其“声”的辨义作用。本文引证了古代学者对“声”的辨义作用的论述及“声”的辨义作用的实例 ,论述了形声字的“声”有表义的作用。掌握了形声字的这一特点 ,才能正确理解原文 ,不至于望文生义 ,曲解文意。 Scholars have already reached a consensus on the metaphorical characteristics of the shaped sound “form”, but often overlooked the role of “sound”. This paper cites the ancient scholars’ dissertation on the role of “sound” and the discerning role of “sound”, and expounds the role of “sound” in phonology. Grasping this characteristic of the phonetic characters, can we understand the original text correctly, not to hinder the literary meaning, misunderstanding the text meaning.