Abstract: Objective To provide a reference of preventing children from lead poisoning by studying the level of lead and the conditions of lead poisoning of 15 564 children in Beijing. Methods The lead in peripheral blood of 15 564 children of Beijing Children's Hospital health examination from January 2011 to December 2012 was detected by atomic absorption spectrometer. According to different genders, the children were divided into male and female groups. According to different ages, they were divided into five age groups: infancy group, toddlers group, preschool group, school age group and adolescence group. The results were analyzed by the software of SPSS13.0. Results The rate of lead intoxication is 1.92% among 15 564 children. The most cases have low-grade lead intoxication. There are significantly differences in different age groups, sex sets and seasons(P<0.05). Boys lead poisoning was significantly higher than girls(P<0.01). There is the highest rate of lead intoxication in school age group(P<0.01). Conclusion Lead poisoning in children can cause damage to children's multiple systems, emphasizing that the scientific feeding, reasonable diet are important, so that children develop good lifestyle. We should pay attention to nurturing children good health habits, let them get away from lead pollution in order to promote the healthy development of children.

Key words: children, lead, lead intoxication