Product modeling design is an important step in the design process,which is directly related to the presentation of the final product,but there is no set of perfect methods and principles to support the practice of product modeling design.This paper takes the proposal and establishment of design concept as the first step of modeling design,then discusses the method of extracting and converting design features,and finally proposes that whether the product design is reasonable should also be tested and improved.Modeling design is not a kind of out-of-order design interpretation,but a scientific and reasonable design logic expression.As the hub between the product and the user,the designer should pay attention to the overall details and aesthetic presentation of the design,and avoid injecting too much design self-expression.The core of design is always people-oriented,and every designer should use appropriate methods to design products that meet the emotional expectations of users.