“姐”作为亲属称谓语,从产生到现在,随着社会的发展,其语义、语用等方面也发生了相应的变化。在总结前人研究成果和搜集整理时下语料的基础上,本文重点分析由“母亲”义变为“女兄”义的语义变化,探讨由敬称扩展出亲近色彩再到调侃、戏谑的语用变化,进而分析促使其变化的原因,试图对前人的研究做进一步的梳理和补充,从而更好地指导语言实践。 “Sister ” as a kinship terms, from generation to now, with the development of society, its semantic, pragmatic and other aspects of the corresponding changes have taken place. On the basis of summarizing the research achievements of the predecessors and collecting the current corpus, this paper focuses on analyzing the semantic changes from “mother” to “her brother” meaning, Pragmatic changes, and then analyze the reasons for its change, trying to make further research and supplement to previous studies to better guide the language practice.