《说文解字》共收录牛部字45个，对比其他家畜类，收字较多，因此其形体可在一定程度上表现语言的意义，而语言中的词语又是对客观自然的最直接反映，因此我们可以从中看出丰富多彩的牛文化。本文主要采用分类法、比较法、列举法等分析方法，以《说文解字》中的牛部字为主要研究对象，对牛部字进行全面细致的研究。本文分为四个部分：第一部分是引言，简介《说文解字》牛部字的字形及部件分类，了解牛部字的基本知识。第二部分是分类并列举《说文解字》中的牛部字字义，简单对牛部字的意义进行分析考证，从而探究牛部字与先民社会心理、农耕生产关系、古代祭祀文化、传统道德文化之间的联系。第三部分列举古今字典中牛部字的收录及编排情况，将《说文解字》中的牛部字 与《现代汉语词典》及《汉语大字典》里保留下来的牛部字进行对比分析，从而探究古今字典中牛部字的差异所体现的文化内涵。第四部分结语展现汉字与文化密不可分的联系，完成对《说文》牛部字的系统研究。

This paper is divided into four parts: the first part is the introduction, a brief introduction to the radical of niu in shuowenjiezi font and parts classification, to understand the basic knowledge of the radical of niu. The second part is to classify and enumerate the meaning of the radical of niu, and simply analyze and research the meaning of the radical of niu, so as to explore the relationship between the the radical of niu and the social psychology of the ancestors, agricultural production relations, ancient sacrificial culture and traditional moral culture. The third part lists the inclusion and arrangement of the radical of niu in ancient and modern dictionaries, and makes a comparative analysis of the radical of niu in shuowenjiezi ,in modern Chinese dictionary and Chinese dictionary, so as to explore the overall development trend of Chinese characters and get some enlightenment. The conclusion of the fourth part shows the inseparable relationship between Chinese characters and culture, and completes a systematic study of the radical of niu in shuowenjiezi.