多模态语篇指的是除了文本之外,还带有图像、图表等的复合话语,现实生活中无处不在。以Kress&Leeuwen提出的多模式话语理论以及Baldry和Thibault提出的意义整合原则为基础,对一则多模态公益海报进行了整体意义的分析,并探讨其社会实践性。研究发现,多种模态的综合应用有助于语篇整体意义的有效表达,构建强烈的社会实践性,该研究亦为多模态语篇的构建提供参考。 Multimodal discourse refers to the compound discourse with images, diagrams, etc. in addition to texts, which are ubiquitous in real life. Based on the multi-modal discourse theory proposed by Kress & Leeuwen and the principle of meaning integration proposed by Baldry and Thibault, this paper analyzes the overall meaning of a multi-modal public service poster and discusses its social practice. The research finds that the comprehensive application of multiple modalities can contribute to the effective expression of the whole meaning of the discourse and build a strong social practice. The study also provides a reference for the construction of multimodal discourse.