Objective: To examine the effects of parental rearing style and its consistency on sleep problems of preschool children and to provide theoretical basis for making early family intervention measures. Methods: A questionnaire survey was conducted among 2 744 children and their parents in 19 kindergartens in Anqing city. Parental Behavior Inventory (PBI) was used to investigate the rearing style of parents, and Chinese version of Children s Sleep Habit Questionnaire (CSHQ) was used to evaluate the incidence of sleep among preschoolers. Results: Preschool children s overall rate of sleep disorder was 15.5%, and accompanied by sleep duration disorder (70.0%), sleep resistance (64.2%), sleep latency (38.7%), anxiety (15.5%), daytime sleepiness ( 10.1 %). Living in urban areas, parents smoking and drinking behaviors, and parents parenting style all affected preschoolers sleep ( P <0.05). Multivariate Logistic regression analysis showed that fathers active rearing style was negatively correlated with preschool children s sleep problems such as delayed sleep impedance and short sleep duration, while mothers active rearing style was negatively correlated with preschool children s sleep problems such as sleep resistance and night wake up ( P <0.05). There was a positive correlation between father s severe rearing style and preschoolers sleep resistance, sleep duration, short sleep disordered breathing, daytime sleepiness and total sleep problems, and mother s severe rearing style and preschoolers sleep duration, short sleep anxiety, night wakefulness, daytime sleepiness and total sleep problems ( P <0.05). Consistent rate of negative rearing patterns was a risk factor for short sleep duration in preschoolers ( OR =2.19，95% CI =1.12-4.28， P =0.02). Conclusion The detection rate of sleep problems in preschoolers is high. Parental supportive involvement has a positive effect on preschoolers sleep, while parental coercion hostile parenting has a negative effect on preschoolers sleep. The consistent rate of rearing styles affects the sleep duration of preschoolers.