The work aims to design growth-oriented children's seats according to the theoretical model of product design and development, to play a positive role in the research of children's furniture design innovation and meet the demand of children's seat in the process of children's growth. Firstly, the KANO model was used to divide the product demand attributes, and the demand indicators with different satisfaction were summarized, so as to clarify the product demand. Secondly, analytic hierarchy process (AHP) was used to establish a multi-level hierarchical model, construct a judgment matrix and conduct weight calculation and sorting. Several solutions for demand were put forward. Experts were invited to investigate and score the solutions. After score weighting and consistency inspection, the weight of each package elements was integrated and ranked. Finally, the main guiding elements of the final design scheme were determined according to the weight ranking, and the design and development of the design scheme were carried out. According to the 3 demand items obtained in the KANO model, the priority items were calculated by AHP, and the calculation results were respectively rounded shape and fillet, soft material of product body, and availability for split and adjustment. Through the new research model combining KANO model and AHP, it is creatively applied to the design and research of growth-oriented children's seat products, contributing to more scientific and reasonable design schemes of growth-oriented children's seat products and higher consumer satisfaction and providing new theoretical methods and ideas for design and research of children's furniture products.