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目的:探讨妊娠期糖尿病孕妇孕前体质指数及孕期增长情况对新生儿出生体质量的影响。方法:抽取2018年6月至2019年10月160例在潍坊市妇幼保健院接受完整治疗并分娩的孕妇，其中正常糖耐量(NGT)组和妊娠期糖尿病(GDM)组，每组80例，记录并比较两组年龄、分娩孕周、妊娠前体质指数(BMI)、分娩前BMI与新生儿出生体质量等。结果:与NGT组比较，GDM组孕前BMI、孕期BMI增长、新生儿出生体质量均高于NGT组(n P<0.05)。新生儿出生体质量与孕前BMI、孕期BMI增长呈正相关(n P<0.05)。n 结论:GDM孕妇孕前BMI过大、孕期BMI过快增长均会影响新生儿的出生体质量，导致巨大儿以及不良妊娠结局，对GDM孕妇进行孕前体质量和孕期BMI增长情况的监测和控制，进行必要的运动锻炼和饮食指导均有助于降低新生儿的出生体质量，避免巨大儿的发生。“,”Objective:To investigate the effect of pre-pregnancy body mass index (BMI) and its gestational growth of gestational diabetes mellitus (GDM) on neonatal birth weight.Methods:A total of 160 cases of pregnant women who received complete treatment and delivered in Weifang Maternal and Child Health Hospital from June 2018 to October 2019 were divided into normal glucose tolerance (NGT) group and gestational diabetes mellitus (GDM) group, with 80 cases in each group. Their age, gestational weeks, BMI before pregnancy and delivery, birth weight of newborns were recorded respectively.Results:Compared with NGT group, BMI before pregnancy, BMI growth during pregnancy and birth weight of newborns in GDM group were significantly higher than those in NGT group (n P<0.05). There was a positive correlation between birth weight and BMI before and during pregnancy(n P<0.05).n Conclusions:GDM pregnant women’s BMI is too large before pregnancy and the rapid growth of BMI during pregnancy will affect the birth weight of the newborn, leading to macrosomia and adverse pregnancy outcomes. Monitoring and controlling the growth of pre pregnancy body mass and BMI during pregnancy, necessary exercise and diet guidance are helpful to reduce the birth weight of newborns and avoid the occurrence of macrosomia.