词汇是语言中最活跃，变化最频繁的因素，最直接、敏感地反映社会文化生活。词义引申是一种有规律的词义运动，从本义出发，按照各民族的习惯不断产生新义或派生新词，从而构成有系统的引申义列。因此，词义引申必然反映了民族社会文化的演变和古人对词汇所代表具体事物的认知和关注重点。本文选取《说文解字》植物类传承字（艹、禾、木部）为研究对象，将传承字本义与《现代汉语词典》中的义项作对比，归纳引申方向和特征，以期发现植物类传承字引申在方向、方法上的内在规律性，探究植物类传承字引申中蕴藏的民族文化信息。本文将《说文解字》植物类传承字依据词性分为名词、动词、形容词，在词性划分的基础上对引申的具体方向进行对比，并在最后一章通过比较三个部首在引申上的异同找出先民对草、禾、木认知上的侧重。

Vocabulary is the most active and frequently changing factor in language, and it reflects social and cultural life most directly and sensitively. Word meaning extension is a regular movement of the meaning, which starting from the original meaning, new meanings or derived new words are produced according to the habits of various nationalities, thus forming a systematic extended meaning column. Therefore, the extension of word meaning must reflect the evolution of national social culture and the cognition and focus of the ancients on the specific things represented by vocabulary.This article selects the plant inheritance characters (Cao,He,Mu) in "Shuowen Jiezi" as the research object, compares the original meaning of the inheritance word with the meaning in Modern Chinese Dictionary, and sums up the direction and characteristics. In order to find out the inherent regularity in the direction and method of plant inheritance characters, and explore the national cultural information contained in the extension of plant inheritance characters.This paper divides the plant inheritance characters of Shuowen Jiezi into nouns, verbs, and adjectives , and compare the specific direction already alluded to, and in the last chapter by comparing the three radicals of Cao, He ,Mu , focusing on the similarities and differences of cognition in different radicals.