The mother can replenish her amniotic fluid by drinking about 2000ml of water quickly within 2 hours, which can usually be replenished within 1 week. Low amniotic fluid is often due to low drinking and sweating of the pregnant woman, resulting in imbalance of the body’s water-electrolyte balance, thus reducing the amount of amniotic fluid. The pregnant woman can replenish it by drinking a lot of water, and the correct way to replenish water is to drink about 2000ml of water quickly within 2 hours, so that the maternal blood volume will increase rapidly and the placental blood volume will increase, thus achieving the purpose of increasing the amount of amniotic fluid. After hydration, you need to review the amniotic fluid volume and monitor the fetal heartbeat in time. However, it should be noted that the above hydration methods are only suitable for cases of low amniotic fluid due to water shortage. For pregnant women with low amniotic fluid caused by intrauterine hypoxia, and accompanied by abnormal fetal heart rate, abnormal fetal size and other conditions, the effect of drinking water is generally not obvious, if necessary, need to consider timely termination of pregnancy. In conclusion, it is recommended that pregnant women should ensure a daily intake of at least 2000ml of water, and in hot environments, the amount of water can be increased appropriately to ensure normal amniotic fluid.