【Objective】 To study the situation of dental caries in 3 to 6-year-old kindergarten children in Laoshan, Qingdao. 【Method】 Oral examinations were performed on 5 620 kindergarten children of Laoshan district which aged 3 to 6 years old and the dental caries data were analyzed by χ² test. 【Results】 The prevalence of dental caries in children aged 3 to 6 years old was 27.7%. As for gender, the prevalence of dental caries was 26.9% for boys and 28.2% for girls. No significant difference in caries prevalence was found by gender. The caries prevalence of children was increased with age, which reached its highest as 49.56% in > 5～6 years old group. There was a significant difference in caries prevalence between age groups. 【Conclusions】 In order to prevent children from dental caries, oral hygiene measures and strategies must be carried out from early childhood when they have primary teeth. Reducing the caries prevalence in children needs cooperated efforts from both parents and kindergarten teachers.