Abstract: The article firstly analyzes the classification of casual sports shoes in terms of production process, upper structure, wearing scene and other perspective rights, and as a main line, discusses the appearance styling design, structural design and functional design elements of casual sports shoes and their application technology respectively. Through the argumentation, it is proposed that in the design of styling form and beauty, firstly, we should understand the process structure and pay attention to the shaping of the overall sense of design, secondly, we should understand the spatial significance of the design, and thirdly, we should understand the differentiated design of the same group of people under the changes of the times; in the elements of functional design, it is proposed that firstly, the method of selecting and matching the outsole should be clarified, and secondly, we should carry out the design of the functional elements of the specific scenes of use, and then we discuss the integration of the biomechanics of movement, orthopaedics and rehabilitation. The integration of sports biomechanics and orthopedics and rehabilitation is discussed in the case study. The article also proposes to pay attention to social hotspots in design, such as the concept of carbon neutrality, rural revitalization, and the concept of non-genetic inheritance, and seeks to provide practitioners with a technical reference in the field of design research and development.