The work aims to solve the problem of poor application effect caused by irregular extraction of curly pattern primitives in the application of Mongolian Medallion patterns, so as to provide new ideas for the innovative design of Mongolian traditional patterns. With Mongolian Medallion patterns as an example, a digital innovative design method was proposed and put into practice. Firstly, the artistic characteristics of Mongolian traditional patterns were analyzed from the three aspects of pattern, structure and color, and the cultural connotation of different patterns was interpreted and the modeling characteristics were summarized. Subsequently, the pattern primitives were extracted by digital means, and the function curves were used to replace their unbalanced lines, so as to standardize the pattern primitives and improve the aesthetics of the pattern. The standardized pattern primitives adopted shape grammar for innovative design, so that the pattern was innovated and the visual image was also improved. This method not only retains the style characteristics of Mongolian traditional patterns, but also meets the aesthetic needs of modern design, enriching the design methods of Mongolian traditional patterns in contemporary products.