Objective:To find out the dental caries condition in children and adolescents of Chongqing to provide data basis for preliminary oral health care of Chongqing.Methods:We adopted the method for oral health investigation of WHO(1997):Firstly

we selected subjects from every section of Chongqing

then devided them into four groups according to age:5-year-lod group

12-year-old group

15-year-old group and 18-year-old group.The examiners are professional dentists.Results:Data of 11592 children and adolescents were collected from 48 surveyed stations.The survey results showed that the prevalence rate of dental carries among students of kindergarten and school was 31.64%

DMFT(dmft) mean was 0.98.Filled tooth rate was 6.74%.Caries rate and DMFT(dmft) mean of female were higher than those male(p<0.01).The incidence in town was higher than that in countryside(p<0.01).Conclusion:The incidence of dental caries in this population is high

especially in town and female.Dental caries epidemiological factors are nutritional condition

geographical environment

dental care condition

oral health concept and behavior etc.We must put prevention policy at the first place.