The paper aims to improve the customer satisfaction coefficient of high-speed train business seats, propose the innovative method based on Fuzzy Kano model and emotional design theory, and explore the user needs in product form design to seek the balance between the two. Firstly, through the qualitative analysis of KJ method, the initial description obtained from the survey is orderly divided, and the demand hierarchy model is constructed, which is classified as the user's first level demand item, and the second level demand evaluation item is established; Secondly, the questionnaire of fuzzy Kano model is designed through two-level demand evaluation items, and the priority of demand items is obtained through membership analysis and importance ranking; Finally, taking the high-speed train business seat as an example, combined with the emotional design theory, the user demand elements are analyzed and selected, and applied to the product form design. Through qualitative analysis and quantitative analysis, combined with the application of emotional design theory, innovative design can strictly and intuitively divide the needs of target user groups for product form design, so as to provide a certain theoretical basis for building a harmonious relationship between products and users, and provide a forward-looking exploration for improving the customer satisfaction coefficient and product form design innovation of high-speed train business seats.