Abstract: Objective： To investigate the relationship between oligohydramnios in late pregnancy and pregnancy complications and its influence on perinatal infants. Methods：A retrospective analysis of maternal data from July 2016 to July 2017 in the department of obstetrics and gynecology in our hospital included 80 cases of late pregnancy oligohydramnisis pregnant women into the observation group， 120 cases of normal pregnant women into the control group at the same time. Pregnancy routine examinations were performed on both groups of mothers and pregnant women. Based on the observed indicators， the incidence of pregnancy complications and the outcomes of perinatal children were compared between the two groups. Results： In the observation group， there were 61 cases of pregnancy complications， accounting for 76.25% of the total number； in the control group， there were 8 cases of pregnancy complications， accounting for 6.67% of the total number. The maternal pregnancy complications of the control group were less than the observation group， and the difference was statistically significant (P<0.05). There were 68 cases of perinatal complications in the observation group， accounting for 85% of the total number； the perinatal complications in the control group had 19 cases， accounting for 15.83% of the total number. The perinatal complications of the control group were less than the observation group， and the difference was statistically significant (P<0.05). Conclusion： Compared with normal amniotic fluid pregnant women， late pregnancy oligohydramnios can increase the incidence of pregnancy complications in pregnant women. Oligohydramnios is one of the factors leading to pregnancy complications. For pregnant women， oligohydramnios during late pregnancy will significantly increase pregnancy complications， and will threaten the perinatal children′s health. Clinical monitoring should be done， and timely and take effective intervention.