【Objective】 To study the sensory integrative dysfunction (SID) and the related influencing factors of 4~6 years old children in Kunshan region, and to provide evidence for early intervention. 【Methods】 The sensory integration ability of 2 515 children in Kunshan nurseries and kindergartens between city and town were determined by stratified cluster sampling, and the sensory integration related factors were investigated with self-made questionnaire. 【Results】 1) The incidence of SID in Kunshan region was 25.45%, The difference between city and town had no statistical significance(χ²=1.41,P>0.05).2) The incidence of SID in boys was higher than in girls, there was high statistical significance(χ²=6.81,P<0.01).The SID incidence among different ages had statistical significance(χ²=8.52,P<0.05).The incidence of the light vestibule balance dysfunction in boys was higher than in girls, there was high statistical significance(P<0.01),the others had no statistical significance.3) The incidence of the light vestibule balance dysfunction in young was higher than in the old, but tactile perception and somatosensory dysfunction were opposite, The incidence of the light vestibule balance dysfunction, the light tactile perception dysfunction and the light somatosensory dysfunction among different ages were different, there was high statistical significance(P<0.01).The incidence of the moderate tactile perception dysfunction and the moderate tactile perception dysfunction among different ages were different, the differences had statistical significance(P<0.05).4) Children's vestibule balance dysfunction had correlation with mother pregnancy reaction. Children's tactile perception dysfunction had correlation with children growth, attitude of father's rearing, feeding patterns before 6 months, children character and mainly caregivers etc. Children's somatosensory dysfunction had correlation with family type and attitude of father's rearing etc. Children growth, family type and attitude of father's rearing had influenced SID of children. 【Conclusion】 Multi-factors integrated influence SID of children in Kunshan region. Children sensory integrative dysfunction should be paid more attention.