In the digital and intelligent era, large language models have opened up new paths for the multimodal dissemination of fine traditional Chinese culture in colleges and universities. Taking Yin-Shang culture as an example, in teaching, large language models can integrate multiple senses and present Yin-Shang culture to students in multimodal forms such as text, images, audio, and video. This expands its dissemination scope, stimulates strong emotional resonance among the audience, and deepens their understanding of the connotations of Yin-Shang culture. However, the multimodal dissemination model faces a series of challenges in classroom teaching, including the adaptability of technology application, the accuracy of content creation, the coordination of dissemination channels, and the understanding differences in cross-cultural dissemination. Based on this, this paper proposes classroom teaching practice paths such as integrating high-quality resources, innovating dissemination strategies, empowering with diverse technologies, and building a sound cross-cultural dissemination system, so as to comprehensively improve the dissemination efficiency of Yin-Shang culture and inject strong impetus into the inheritance and development of fine traditional Chinese culture.