To evaluate the influence of individual genetic polymorphisms of metabolic enzymes on urinary styrene metabolites.58 workers occupationally exposed to styrene were divided into the high exposure group (≥ 100 mg/m³) and the low exposure group (< 100 mg/m³). The microfluidic chip technology was used to determine the SNPs of CYP2B6, CYP2D6 and GSTP1 and the influence of gene polymorphisms on the metabolism of styrene was statistically analyzed.The level of urine styrene metabolites level was influenced by genotypes of CYP2B6, CYP2D6 and GSTP1 [(280.28 +/- 100.60) mg/g Cr vs (183.48 +/- 127.52) mg/g Cr, (233.04 +/- 77.56) mg/g Cr vs (152.46 +/- 95.47) mg/g Cr, (32.88 +/- 7.14) mg/g Cr vs (24.47 +/- 5.59) mg/g Cr, P < 0.05)]. The metabolism of CYP2B6 G/G homozygotic genotype to styrene was more active than G/T heterozygotic genotype and T/T mutation genotype. The level of PHEMA in GSTP1 homozygotic genotype subjects was significantly higher than that in the group of homozygotic genotype [(32.07 +/- 7.32) mg/g Cr vs (25.59 +/- 6.95) mg/g Cr, P < 0.05)]. The influence of CYP2D6 genotypes on urinary metabolites was also observed in the same study [(56.36 +/- 109.72) mg/g Cr vs (177.13 +/- 116.21) mg/g Cr, (118.73 +/- 84.55) mg/g Cr vs (148.48 +/- 99.83) mg/g Cr, (18.29 +/- 13.50) mg/g Cr vs (19.95 +/- 13.30) mg/g Cr, P < 0.05)].Genotypes of CYP2B6, GSTP1 and CYP2D6 are related to susceptibility to the metabolism of styrene in human.