Objective: To compare the maternal and neonatal outcomes of pregnant women with gestational hypertension (GHp) under different blood pressure control levels. Methods: This retrospective study was collected from a total of 296 mild to moderate GHp patients in the hospital during January 2015 to December 2017. According to the blood pressure control level during pregnancy, pregnant women with relatively higher systolic pressure and diastolic pressure were divided into group A (<130/80 mmHg, 107 cases), group B [(130–139)/(80–89) mmHg, 121 cases], group C [(140–149)/(90–99) mmHg, 36 cases] and group D [(150–159)/(100–109) mmHg, 32 cases]. The occurrence of severe GHp, preeclampsia (PE), PE with proteinuria, severe preeclampsia (sPE) and small for gestational age infants and pregnancy outcomes were compared among the four groups. Results: Differences in incidences of severe GHp and sPE among the four groups showed statistical significance (P<0.05). With the increase of blood pressure during pregnancy, incidences of severe GHp and sPE increased (P<0.05). Differences among the four groups in incidences of PE, PE with proteinuria or small for gestational age infants showed no statistical significance (P>0.05). Logistic regression analysis showed that blood pressure level during pregnancy was an independent influencing factor of severe GHp and sPE in pregnant women with mild to moderate GHp (P<0.05). Differences among the four groups in incidences of premature delivery and postpartum hemorrhage, neonatal Apgar score and incidence of neonatal asphyxia showed statistical significance (P<0.05), which changed with the blood pressure level. Conclusion: Maternal and neonatal outcomes are affected by maternal blood pressure level. Active control of the blood pressure level in pregnant women with mild to moderate GHp can help to decrease the occurrence of severe GHp and sPE.