文章从三个角度探讨现代汉语三音词迅速发展的原因。社会原因方面,社会发展的迅速、不同社群接触的频繁以及大众传媒的推波助澜有力地促进了三音词的发展;语言内部原因方面,语言表达精确化和经济性的对立统一、语言材料的丰富化促使三音词大量产生;语言使用者的原因方面,思维的精密化和汉语社群对三音词稳定的心理认可度是现代汉语三音词发展的潜在原因。三个方面的原因互相交融,共同促使现代汉语三音词大量产生、迅速发展。 The article explores the reasons for the rapid development of the three-syllable in modern Chinese from three perspectives. In terms of social reasons, the rapid social development, the frequent contact among different communities and the help of the mass media have promoted the development of the three-syllable words. The internal reasons of language, such as the unity of opposites of language expression and economy, and the enrichment of language materials In the reason of language users, the precision of thinking and the psychic recognition of the stability of the tri-syllables by the Chinese community are the underlying reasons for the development of the tri-syllabic words in modern Chinese. The three causes are interwoven with each other to jointly promote the rapid development of the three-syllable words in modern Chinese.