100 ?g/L), 36(2.90%)male and twenty four (2.09%)female. BLLs(G) in Baiyuen (suburb) children(60.33 ?g/L) was the highest among three districts, Yuxiu (downtown) was 58.09 ?g/L and Zengcheng (countryside)was 56.72 ?g/L. Linear regressions (stepwise) were taken with geometric BLLs as dependent, 34 items as independents in SPSS 11.5. Fathers with lower diploma, narrower houses, better aired houses, fewer hand washings and sucking fingers were the risk factors for children high BLLs. Conclusion BLLs in suburb children become the highest after unleaded gasoline used in Guangzhou. The housing circumstance and hygienic behavior of children may effect the blood lead level.