In the context of unprecedented changes, it is urgent to enhance the confidence of Chinese culture and strengthen the cultural education of young people. With the booming development of the animation industry, as an emerging carrier of cultural inheritance and innovation, it provides new and effective ways for cultural education. This study focuses on the domestic animation The Longest Day in Chang'an, deeply analyzing its cultural elements and educational strategies, aiming to explore how to effectively convey cultural values through animation as a media form, promote the improvement of youth cultural literacy, and enhance national cultural confidence. I hope to make positive contributions to the development of cultural education theory and practice, as well as the healthy and prosperous domestic animation industry.