本文拟以兰州城市马拉松宣传片视频为例,探讨该视频中多模态的意义建构和动态多模态话语各模态之间的协同如何建构兰州城市身份。分析重点包括:语料的再现意义、互动意义和构图意义;语料的文化语境、情景语境和符际互补与协同。本研究将丰富多模态相关研究;加深对语言实践和城市身份构建之间关系的进一步理解;对兰州城市身份构建提供一些指导。在信息多元化时代,意义的建构已不仅限于单一的文字语言模态,而是把文字、图像、颜色、声音和视频等结合起 This article intends to use Lanzhou city marathon video as an example to discuss how the symbiosis of multi modal construction and dynamic multimodal discourse in the video build Lanzhou city identity. The key points of the analysis include: the meaning of reproduction, the meaning of interaction and the composition of the corpus; the cultural context of the corpus, the situational context of the corpus and the complementarity and coordination of the character. This research will enrich multi-modal research, deepen the understanding of the relationship between language practice and urban identity construction, and provide some guidance for the construction of Lanzhou city identity. In the era of diversified information, the construction of meaning has not only limited to a single text language modality, but has combined words, images, colors, sounds and videos