Oligohydramnios is characterized by a deficiency of amniotic fluid surrounding the fetus and can occur at any stage of pregnancy. Amniotic fluid index less than 3 cm is significantly associated with adverse pregnancy outcomes. Amniotic infusion is referred that instillation of saline or Ringer′s lactate is instilled into the amniotic cavity through abdomen or cervix to correct oligohydramnios. Amniotic infusion is proved to be safe, but a complete evaluation of the benefits and complications of the operation is necessary before operation. Amniotic infusion is mainly applied in patients with preterm premature rupture of membranes, which can extend rupture-delivery time window and prevent risks of pulmonary hypoplasia and infection. However, more evidences are still required to promote amniotic infusion as a routine clinical treatment.