Qiang embroidery pattern has a single visual expression form in modern design activities, and the main goal of its design is to disseminate effective cultural information to the audience. To address the existing limitations, the work aims to explore its design ideas in dynamic poster design based on the iconological theory. By analyzing the current development of Qiang embroidery patterns in modern visual communication design, it was proposed that the visual communication of Qiang embroidery patterns should take advantage of the development of dynamic posters. Then, the design principles of dynamic posters were summarized and the design process was established with the guidance of iconographic theory. The design of dynamic posters was guided by the theories of pictorial interpretation, extraction and transformation of Qiang embroidery patterns based on the research framework of iconographic theory. The extracted graphic elements were classified according to themes and applied to the dynamic evolution of graphic elements of posters combined with modern design techniques and the evolution rules of shape grammar to complete the dynamic poster design themed on Qiang embroidery patterns. Based on the three levels of iconographic theory, the importance of "form" and "meaning" of Qiang embroidery patterns in modern visual communication design is extracted, and the innovative proposal of relying on dynamic posters as a carrier makes the design connotation of Qiang embroidery patterns conveyed to the audience through dynamic posters richer, which is of high practical significance in disseminating and inheriting the non-traditional heritage of Qiang embroidery and building national cultural confidence. In the current era of new media, it is conducive to presenting Qiang embroidery patterns to the public in a more imaginative, vivid and diversified form through the technical means of dynamic posters.