Children's sitting posture orthosis set, including sitting posture maintenance orthosis, tablet, bookshelf and sitting posture straps. The designer analyzed the children's psychology and used the robot's shape to design, which ensured the functionality, increased the children's interest and reduced the children's rejection psychology. The unified design language continues, and the tablet and bookshelf also use the shape of a robot. The pencil case function is also added to the bookshelf, which enriches the use scene of the product and increases the interactive fun.