Objective To study the characteristics of ambulatory blood pressure in advanced age patients with hypertension during pregnancy and its effect on pregnancy outcome, and to explore the clinical significance of ambulatory blood pressure monitoring in advanced age women with hypertension.Methods A retrospective analysis from January 2016 to August 2017, in patients with pregnancy induced hypertension in the Second Affiliated Hospital of Kunming Medical University of production inspection and delivery in hospital as the research object, according to the age of pregnant women, they were divided into the advanced age group (35 years of age or older, n=100), and age group (age<35, n=100). All the pregnant women underwent 24-hour ambulatory blood pressure examination in the middle and third trimester of pregnancy to compare the difference of ambulatory blood pressure parameters between the two groups and the relationship between them and the adverse outcome of pregnancy. Results Systolic pressure index of the advanced age group 24 hours average systolic pressure, day mean systolic pressure, night mean systolic pressure, day systolic pressure load value, night systolic pressure load value were higher than the age group, the differences were statistically significant (P<0.05); The incidences of cesarean section and premature infant were higher than thase in the age group, and the differences were was statistically significant (P<0.05). The average diastolic blood pressure andthe day systolic load were correlated with fetal growth restriction in both the aged and age groups, and the 24-hour mean diastolic blood pressure was associated with preterm infants. Conclusions Ambulatory blood pressure monitoring has a positive significance in the diagnosis, evaluation and reduction of adverse pregnancy outcomes in the advanced age patients with hypertensive pregnancy, and can be used as prenatal routine examination for the advanced age pregnant women.