By analyzing the characteristics of ASD children's visual preference, the effectiveness of modeling design evaluation of the accompanying robot can be improved, which provides a reference for designers and teaching assistants.First of all, the representative modeling samples of accompanying robots in the market were investigated and sorted out, manipulated in monochromatic processing and made into brightness histogram; Then, according to the literature analysis, 10 representative eye-movement indexes were selected from more than 30 eye-movement indexes, and the experiment was conducted with the eye-movement tracking method with collected data of eye-movement indexes and visual preference score; After that, three eye-movement indexes were selected by the stepwise regression; On this basis, the regression relationship between the main factors of eye-movement index and visual preference was established and verified by experiments.According to the experiment, it is found that the basic geometric shape of the accompanying robot is more consistent with the visual preference of ASD children.By analyzing and utilizing the correlation of visual preference, eye-movement indexes and morphological characteristics of the ASD children accompanying robot, it can provide theoretical basis for the research of the modeling design of the accompanying robot.