Abstract: Objective To determine the effects of maternity dietary and nutrition on newborn bitrthweight in order to make effective intervention strategies and measures.Methods Pregnant women attending predelivery check in four urban and four rural hospitals were randomly selected as subjects of a follow-up study.Anthro pmetric measurements of newborns and pregnant women were taken.Blood samples of pregnant women were obtained for nutritional analyses.All data were an alyzed witht test,Fisher test,correlation analysis,and multivariate regression analysis.Results The mean birthweitht of newborns was 3 392g.The proportion of low birthweight and macrosomia was 3.97% and 13.25%,respecively.Pregnancy less weight gain and serum calcium and lower vitam in A concentration increased the risk of low birthweight of the neaborn.Effects on macrosomia were more pregnancy weight gain and higher BMI before pregnancy.Conclusion Dietary and nutritional status of pregnant women affect new born birthweight.Keeping good BMI before pregmancy,proer pregnancy weight gain attribute to delivery of normalweight newborn.