Objective: To investigate the association between parental environmental risk factors exposure and the risk for childhood acute lymphoblastic leukemia (ALL). Methods: A total of 179 ALL children cases were selected in Tianjin Blood Disease Hospital and 136 healthy children matched by age, gender and living place were selected in 2015 for a case control study. The data were analyzed with univariate and multivariate non conditional logistic regression models. Results: The results of multivariate logistic regression analysis indicated that sex, history of abortion, exposure in a smoking environment during pregnancy, catching a cold, taking antipyretic analgesics, maternal exposure to air purifying agent, father' s occupational exposure to petroleum products and home decoration during pregnancy were associated with the risk of childhood ALL (P<0.05) and the results of multivariate logistic regression analysis indicated that sex, history of abortion, catching a cold, father's occupational exposure to petroleum products and home decoration during pregnancy were associated with the risk of childhood ALL (P<0.05). Conclusion: The five factors including sex, history of abortion, catching a cold, father' s occupational exposure to petroleum products and home decoration during pregnancy were risk factors for childhood ALL.