The establishment of evaluation indicators for the interactive design of the navigation buttons on the tablet computers for preschool children, which is conducive to the improvement and optimization for the interactive buttons of preschool children’s tablets. From the perspective of preschool children's experience, a multi-dimensional and multi-level evaluation index for interactive design of tablet navigation buttons was created. The method was based on the created multi-dimensional and multi-level evaluation indicators, and the decision matrix of the evaluation indicators was designed according to the D-S evidence theory, and the weight of the evaluation indicators was determined by the analytic hierarchy process. Finally, taking the interactive design of navigation buttons on the "Fairy Tales" interface of the children's tablet of the You School as an example, the comparative analysis and evaluation of the eight optimized design schemes verify the rationality and effectiveness of the proposed method.