The study was completed in May 2015 with 473 children aged 5-year-old in 9 preschools and 476 children aged 12-year-old in 9 middle schools in the district, according to the method of investigation and classification of WHO-2013; Research results showed that: 5-year-old children: the rate of tooth decay was average (59.8%); male (62%) higher than female (57.2%) with the difference not statistically significant (p>0.05); the average of tooth decay-loss-filling was at an middle level (2.71±3.22), in which the index of decay was mainly, the index of loss was absent, the index of filling was very little; the average of decay-loss-filling of tooth face was quite high (8.36±11.5); treatment needs: 0.52 teeth/1 child need filling 1 tooth, and 0.79 teeth/1 child need filling 2 teeth.