Abstract: Objective:To investigate the blood lead level and related risk factors of children aged 0-6 in Nanshan District of Shenzhen city,and to explore the preventive measures of risk factors.Methods:The blood lead levels were measured in 4 325 children aged 0-6 in Nanshan District of Shenzhen city from December 2013 to December 2015.Results:In children aged 0 to 6 in Nanshan District,4-5-year old,5-6-year old children had the highest incidence of high blood lead,and compared with other age groups，there was significant difference(P<0.05).The incidence of high blood lead in male children was 15.61% (400/2 562),higher than that of girls (164/1 763),and the difference was statistically significant (P<0.01).The blood lead level in boys was (29.2±12.9)μg/L,which was significantly higher than that of girls［(27.1±11.8)μg/L］,and the difference was statistically significant(P<0.05).The risk factors mainly included the passive smoking,family environment,health habits and eating habits.Conclusion:In order to prevent the diseases related to high level of blood lead in children and to promote effective decrease in the amount of lead in the blood,children should be kept away from exposure to lead-polluted goods and foods with a high content of lead,and they should also be educated to develop good eating habits and health habits.

Key words: High blood lead, Blood lead level, Risk factor, Children