在生成语言学中,X’-理论一直占据着很重要的地位,并处在发展完善之中。本文从其发展的角度,描写了X’-理论发展的各个阶段,整理出一个清晰的发展脉络,说明生成语言学一直在用经济原则探究语言的本质。 In generative linguistics, X’-theory has always occupied a very important position, and is in perfect development. From the perspective of its development, this paper describes all stages of the development of X’-theory and puts forward a clear development vein. It shows that the generative linguistics has been using the economic principle to explore the nature of the language.