Abstract: Objective To analyze the incidence of simple obesity among preschoolers in Xuzhou City and explore its influencing factors. Methods The convenience sampling method was used to select the top 5 kindergartens in the number of children in Xuzhou as the survey site. All preschoolers aged 3-5 years old in the selected kindergartens were subjected to physical examinations, and questionnaire surveys were conducted on their parents. Descriptive epidemiological analysis method was used to analyze the current status of simple obesity in preschoolers, and univariate and multivariate analysis Methods were used to analyze the influencing factors. Results In this study, a total of 4 464 preschoolers aged 3-5 years old in Xuzhou were surveyed, including 2 236 boys and 2 228 girls. Children aged 3, 4, and 5 accounted for 35.1%, 32.0%, and 32.9% respectively, and children in urban kindergartens accounted for 78.4%. There were 291 children with simple obesity, with an incidence rate of 6.5%. The results showed that preschoolers aged 3-5 years old in Xuzhou were more likely to develop simple obesity if their parents had at least one obesity （OR=1.881）, birth weight ≥ 4.0 kg （OR=2.349）, older age （OR=1.523）, preference for high calorie food （OR=2.968）, little eating fruits and vegetables （OR=2.430）, preference for snacks （OR=2.678） and not easy to accept new food （OR=1.499）. Conclusion The incidence of simple obesity among preschoolers aged 3-5 years old in Xuzhou is relatively high. Simple obesity of children is related to factors such as dietary behavior, age, birth weight, and parental obesity. To cultivate good dietary habits for preschoolers and improve dietary behavior problems, can actively and effectively prevent the occurrence of simple obesity in children.

Key words: Preschooler, Simple obesity, Dietary behavior, Influencing factor