由于时代、地域的变迁，大量形声字声旁的表音功能已丧失，“识字认半边”已不可靠。但是，“半边字”包括表音的偏旁、表义乃至兼表音义的偏旁具有重要的作用和巨大的价值。文字学上所说的“古今字”、“分化字”、“区别字”、“累增字”的源头，即它们所从出的母字，正是有关的“半边字”。古文献中直接用“半边字”表本义、借义、引申义者屡见，识透“半边字”有助于探究古文字形音义及其源流演变。音韵学上，“半边字”是推寻古韵部的重要线索：“同谐声者必同部”，“半边字”的价值超过“韵脚字”。古声母的推寻也可借助“半边字”。“半边字”又是训诂学上探究同源词的重要凭借。借鉴“右文说”的合理内核，在训诂实践中加以推阐，从而揭示不少形声字“声中有义”，学者们取得了可观的成果。辨析、识透“半边字”确为解读古文字、古文献的重要途径之一。 Due to the changes of times and regions, the phonetic transcription of a large number of phonograms has been lost. However, “half-word” includes phonetic parallax, phonetic meaning, and even phonetic meaning and has great value and great value. The word “ancient and modern characters”, “differentiated characters”, “distinctive characters” and “tired words” originated from the literary meaning, that is, the mother word they are derived from, is the relevant “half word.” Ancient literature directly with the “half-word” table of the original meaning, borrowing, extension of the righteous commonplace, to understand “half-word ” is helpful to explore the ancient text shape and meaning and its evolution. In phonology, “half-word” is an important clue to push forward the ancient rhyme department: the value of “half-word” exceeds “rhyme”. The ancient consonants can also push the “half-word”. “Half Word” is another important virtue in the study of cognate words. Drawing on the reasonable core of the “right verse” theory, we can deduce it in the practice of exegesis, revealing that many phonograms have “sound meaning” and scholars have achieved remarkable results. Discrimination, through “half word” is indeed an important way to interpret the ancient writing, ancient literature.