It aims to provide theoretical guidance for the innovative design of Yingjing Shaqi. It discusses classification and design method of bionic design from the perspective of design purpose, and then investigates the present situation of the purpose bionic design of Yingjing Shaqi. On this basis, it puts forward design suggestions of biological symbol selection and biological feature extraction. Designers are exploring modern expression of Yingjing Shaqi, and the purpose bionic design is an important method for its innovative design. The key of this method is that how to select biological symbol and extract biological feature from the three aspects of rational, vivid and emotion.