汉语词汇从古到今发展的趋势是双音化。从西周开始就有了双音节词的出现,之后随着社会的发展,多音节词汇开始增多,而且占了总词汇的大多数。元明清时期,双音节词汇已成为汉语词汇的主流。本文先对汉语词汇双音化的原因做以阐述,然后指出汉语词汇双音化的研究对对外汉语词汇教学的重要作用。 The trend of the development of Chinese vocabulary from ancient to present is disyllabic. Since the beginning of Western Zhou Dynasty, there have been the appearance of disyllabic words. With the development of society, multi-syllable words began to increase and accounted for the majority of the total vocabulary. Yuan, Ming and Qing Dynasties, the two syllable words have become the mainstream of Chinese vocabulary. This paper first expounds the reasons for the disyllabicization of Chinese vocabulary, and then points out the important role of the study of disyllabicization of Chinese vocabulary in vocabulary teaching of Chinese as a foreign language.