Objective: Related social factors and neurotransmitter pathway gene polymorphism of child Attention deficit-hyperactivity disorder (ADHD) was investigated to provide evidence for ADHD prevention and control and clue for further ADHD genetic study. Methodology: In the case-control study, social information of 233 ADHD children and 711 health children were investigated by a self-designed questionnaire. Blood samples of 168 ADHD children and 233 health children were collected. Ten Single nucleotide polymorphisms (SNPs) of SLC6A3, DRD4, SLC6A2 and ADRA2A were tested. Findings: In multiple logistic regression, ADHD were related to male (OR=4.96,95%CI: 3.28-7.49), 6-9 years old (OR=1.77, 95% CI: 1.24-2.53), family month income ≤3000 yuan per capita (OR=1.85, 95%CI:1.31-2.61), preterm birth (OR=3.09,95%CI:1.15-8.33), mother general or poor mood (OR=1.67, 95%CI:1.18-2.36) and indirect smoking (OR=1.81, 95%CI: 1.20-2.72) during pregnancy, general or poor parents relationship (OR=1.92, 95%CI:1.31-2.82), father accompany with child <4 hours a week (OR=1.80, 95%CI:1.16-2.79), house decoration last year (OR=1.62, 95%CI:1.03-2.55) and child indirect smoking (OR=1.77, 95%CI:1.16-2.69). Adjusted for child sex and age, DRD4 rs747302, DRD4 rs3758653 and ADRA2A rs521674 polymorphisms were associated with ADHD, ADHD subtype and ADHD-ODD (all P<0.05). SLC6A2 rs168924 and DRD4 rs1800955 polymorphisms were related to ADHD and ADHD subtype (both P<0.05). There were significant associations between ADRA2A rs2484516 polymorphisms and ADHD-Inattention (P<0.05), between SLC6A2 rs40615 polymorphism and ADHD-Hyperactive + Combined and ADHD-ODD (both P<0.05), and between rs28386840 polymorphism and ADHD-ODD (P<0.05). Conclusion: Boy aged 6-9 years old and preterm children should be screened