Product design is based on the needs of users, on the basis of professional suggestions, appearance design, structural design. Creativity is the soul of product design. Product design needs to be beautiful, appearance design needs to be novel and unique, with outstanding features and attractive. Appearance design is not a simple drawing. It requires designers to have an in-depth understanding of product structure, materials, craftsmanship, technology and other aspects, and flexibly use their own experience and skills to give a reasonable and feasible design plan. The appearance design effect of the product will be affected by the process and technology. For the products that need to be upgraded, on the basis of understanding the original products, find the areas that need to be improved, innovate in the function and appearance of the products, and reshape the brand image. The needs of enterprises for product design are diverse, which require designers to analyze from a professional perspective, give appropriate suggestions, and jointly promote the process of the project through communication and coordination with enterprises. In addition to professional knowledge and skills, product designers also need to be familiar with relevant appearance effects and appearance processes, be able to skillfully and correctly use the expression effects of relevant processes in product design, and formulate relevant surface treatment process requirements. Understand the structure of the product, human-machine functions, use requirements, production and manufacturing, etc. The product appearance designer also needs to communicate with the structural engineer before designing to understand the structure and specific size of the product, the size, thickness, material and related processing methods of the product shell, etc., and strive to be perfect in the product appearance design. And lay a good foundation for product structure design.