Multimodal discourse analysis is a relatively new area of study and has received great attention these years . Relative studies have also made development in recent years concerning advertisement, classroom education, political speech, and commer?cial events, but few have stepped into the music domain. This paper made use of Taylor Swift’s hit single“Look What You Made Me Do”to explore multimodal discourse analysis on music from the perspective of multimodal metaphor and the formal level of sys?temic functional linguistics (SFL), and to reveal the relationship between its lyric, tune, and music video, which shows how these multimodal discourse interrelated and coordinated to express the producer’s meaning, attitude, and ideas.