Aiming at the problems of poor design orientation and insufficient product innovation of children's beds in two-child families, a multi-functional children's bed design mode integrating KANO model and TRIZ theory is proposed to provide solutions for the innovative design of children's furniture in two-child families. Firstly, it analyzed the current market situation of children's beds in two-child families; secondly, it built KANO model based on SPSSAU platform to analyze the user's needs, excluding the non differential attributes, and established the product function positioning according to the priority of essential attributes, expectation attributes and charm attributes; then, it used the Altshuller contradiction matrix of TRIZ to find out the invention principle, that can guide the structural innovation, and designed the shape parameters according to the characteristics of children's furniture national standard requirements. A modular multifunctional children's bed was designed for children aged 3-16 in two-child families.Through the integration of KANO model and TRIZ theory, we can capture the needs of users accurately, establish the product positioning scientifically, and guide the technical breakthrough efficiently, which verifies the feasibility of this method in the design practice of multi-functional children's beds.