德·索绪尔的语言演变理论是他的理论体系的重要组成部分。索绪尔的语言演变观有三个主要特点:其一,从语言本质出发,语言变化被赋予一种新理念,即语言的变化是关系或价值的变化;其二,语言的共时态和历时态虽有本质区别,但前者是研究后者的基础;其三,单位问题在研究语言的历时态中有重要地位,这是解决语言演变的关键。 De Saussure’s theory of linguistic evolution is an important part of his theoretical system. Saussure’s language evolution view has three main characteristics: First, starting from the essence of language, language change is given a new concept that the language change is the relationship or value changes; Second, the language of the total tense and duration Although there are essential differences in state, the former is the basis for the study of the latter. Third, unit problems play an important role in the diachronic study of language, which is the key to solving the language evolution.