目的:探讨产妇孕期被动吸烟对低出生体重儿发生情况的影响,分析二者的相关性。方法:采用随机抽样法选择2011～2012年在该院进行产前检查并分娩的产妇900例,有孕期被动吸烟史450例,无孕期被动吸烟史450例。分析两组低出生体重儿发生情况。结果:孕期被动吸烟是低出生体重儿发生的危险因素。结论:加强产前保健,避免产妇孕期被动吸烟有助于降低低出生体重儿的发生率,间接减少社会和家庭负担,提高出生人口素质。 Objective: To investigate the influence of passive smoking during pregnancy on the incidence of low birth weight infants, and to analyze their correlation. Methods: Random sampling was used to select 900 maternal mothers during prenatal checkup and delivery from 2011 to 2012. There were 450 cases of passive smoking during pregnancy and 450 cases of passive smoking during pregnancy. Analysis of two groups of low birth weight infants. Results: Passive smoking during pregnancy was a risk factor for low birth weight infants. Conclusion: Strengthening prenatal care and avoiding passive smoking during pregnancy can reduce the incidence of low birth weight infants, indirectly reduce the social and family burden and improve the quality of the birth population.