词汇意义和社会发展是密不可分的。随着时代的发展,数字词汇作为汉语语言大家族里的一员,除了表示数目意义意外,还获得了更多的意义,形成了古今意义对比。然而,词汇意义的改变并不是毫无理据的,认知语言学和心理学的研究表明隐喻和转喻是词汇意义改变的两大重要机制。同时,我们也不能忽视文化共有规约常识。本文从隐喻、转喻和文化共有规约常识来探讨汉语数字词汇意义改变过程中的理据。 Vocabulary and social development are inextricably linked. With the development of the times, as a member of the big family of Chinese language, digital vocabularies have gained more meaning than the number of meaning accidents, forming a contrast between ancient and modern meaning. However, the change of lexical meaning is not unreasonable. Studies in cognitive linguistics and psychology show that metaphor and metonymy are two important mechanisms for changing lexical meaning. At the same time, we can not ignore the common cultural conventions. This article explores the motivation in the process of changing the meaning of Chinese numeral lexicon from the common sense of common statute of metaphor, metonymy and culture.