Objective To investigate the effects of dietary management during labor process on pregnancy outcome of pregnant women with gestational diabetes mellitus.Methods A retrospective analysis was conducted on the clinical data of 122 pregnant women with gestational diabetes mellitus who delivered at the Wenzhou People's Hospital between January and December 2022.Based on their dietary management methods,these patients were divided into an observation group and a control group,with 61 cases in each group.The control group underwent routine dietary management,whereas the observation group received dietary management during labor process.The labor process indicators and delivery outcomes between the two groups were compared.Results The energy intake in the observation group was(75.36±9.54)kcal/h,which was significantly higher than(57.23±8.12)kcal/h in the control group(t=-11.30,P<0.05).Furthermore,the highest blood glucose levels,hyperglycemia ratios,and proportions of insulin usage in the observation group were(6.74±0.99)mmol/L,4.92%(3/61),and 3.28%(2/61),respectively,which were significantly lower than those in the control group[(7.72±1.05)mmol/L,40.98%(25/61),21.31%(13/61),t=5.30,x2=22.43,9.20,all P<0.05].Additionally,the observation group had significantly shorter first stage labor time[(418.66±114.26)minutes],active stage time[(281.37±129.65)minutes],and second stage labor time[38.14±17.25)minutes]compared with the control group[(519.93±132.45)minutes,(358.69±153.26)minutes,(51.37± 18.62)minutes,t=4.52,3.00,4.07,all P<0.05].The incidence of neonatal hypoglycemia in the observation group was 1.64%(1/61),which was significantly lower than 16.39%(10/61)in the control group(x2=6.39,P<0.05).Conclusion Dietary management during the labor process can effectively improve the blood sugar level of pregnant women with gestational diabetes mellitus,as well as enhance the maternal and fetal outcomes.