To investigate the status of tooth caries of 6-8 years old school children in Zhongkai Hi-Tech Zone of Huizhou city, and to provide scientific data for prevention and treatment on caries.

Referring to the Guideline for the 3rd National Oral Health Survey, the dental caries status of 1-2 grade students in 32 primary schools were investigated, and the data were analyzed by SPSS 14.0 statistical software.

The prevalence rate of deciduous teeth caries in 4390 children was 67.4%, and the DMFT was 3.94; The eruption rate of the first molars was 81.5%, with the prevalence rate of caries was 24.3%, and the DMFT was 0.448. The rate of caries for 8 years old children is higher than in 6-7 years old children (P < 0.001).

There is a high caries rate in children in Zhongkai Hi-Tech Zone of Huizhou, so oral health education, primary teeth caries treatment, and fissure sealant of permanent teeth should be strengthened.