Halliday关于“语言的社会符号性”理论认为语言是一种社会符号,情景语境是一种符号结构,其三个 变量语场、语旨和语式分别决定了语义系统的概念功能、人际功能和语篇功能。本文基于对实际语篇的分析旨在具 体阐述这一理论,揭示语言符号的系统和功能的语言学意义。 Halliday’s theory of “social symbolism of language” holds that language is a social symbol and contextual context is a symbolic structure. The three variables of the language field, the language and the language respectively determine the conceptual and interpersonal functions of the semantic system And discourse features. Based on the analysis of the actual discourse, this article aims to elaborate the theory and reveal the linguistic significance of the system and function of linguistic signs.