Under the unique natural environment and historical conditions of the Zang-Qiang-Yi Corridor, a large number of small ethnic groups with small numbers but unique culture have been preserved. Its unique culture and art are indispensable in the treasure house of Chinese civilization. Is the symbol of the pluralistic pattern of Chinese civilization. Based on the example of Ersu Tibetan——a typical small ethnic group in southwest Sichuan, this paper studies and interprets the pictorial characters and symbols of the most important literature in its culture and art ," counting the day book "as a sample. And digital design and reproduction. Through the intersection of ethnology, design, aesthetics, semiotics and so on, the digital system of "Calendar Book" in the Tibetan language of Ersu was reconstructed by digital hand drawing, and applied to the construction of local tourism culture. It is an important attempt to protect and activate the cultural diversity of the Zang-Qiang-Yi Corridor.