本文在介绍韩礼德系统功能语法理论的基础上,探讨其对大学英语写作教学的指导意义及其应用,认为教师应根据决定语言的情景因素—语场、语旨和语式,有效地挖掘学生运用语言的潜力,激发学生创造性运用语言的能力。 Based on the introduction of Halliday’s grammatical theory of functional grammar, this paper explores its guiding significance and its application to the teaching of college English writing. It is suggested that teachers should effectively tap students’ use according to the situational factors that determine the language - field, language and language The potential of language to motivate students to use their language creatively.