目的:通过普查幼儿园2～6岁乳牙牙合儿童315名,研究乳牙牙合分阶段矫治模式。方法:统计315名乳牙牙合儿童错牙合畸形发病率,研究分组比较各类错牙合的发病率。结果:①样本乳牙牙合错牙合发病率为47.30%。②影响错牙合发病的因素中,喂养方式、不良习惯阳性率差异有统计学意义(P<0.05)。结论:①乳牙牙合错牙合发病率较高,对其治疗的长期性应提高重视。②影响因素更倾向于各因素叠加后的综合效应。 OBJECTIVE: To study the phased correction of deciduous teeth occlusion by census of 315 children aged 2 ~ 6 years old. Methods: The incidence of malocclusion in 315 children with primary deciduous teeth was calculated. The incidences of malocclusion in various groups were compared among the groups. Results: ① The incidence of occlusal malocclusion was 47.30%. Among the factors affecting the incidence of malocclusions, the positive rates of feeding and bad habits were significantly different (P <0.05). Conclusion: ① The incidence of occlusal malocclusion is high, and the long-term treatment should be paid more attention. ② The influencing factors are more inclined to the comprehensive effect after the superposition of various factors.