The amniotic fluid index at 35 weeks of pregnancy is normal between 8-18cm, the amniotic fluid index <8cm is called too little amniotic fluid, >18cm is called too much amniotic fluid; the depth of amniotic fluid is 3-8cm and the volume of amniotic fluid is 300-2000ml are normal. The 35th week of pregnancy belongs to the late stage of pregnancy, it is necessary to do ultrasound examination and pay attention to the situation of amniotic fluid.1. Excessive amniotic fluid: the amniotic fluid increases significantly, the pregnant woman’s diaphragm will be elevated and symptoms such as difficulty in breathing will occur, in serious cases, appropriate puncture can be done to release some of the amniotic fluid to relieve the symptoms. The fetus should also be checked for abnormalities in the development of the digestive system, commonly known as tracheoesophageal fistula. In addition, the fetus should be checked for normal development of the nervous system. Excessive amniotic fluid may be combined with gestational diabetes and a 75g glucose tolerance test is required, which is usually present in pregnant women. A low-carbohydrate diet and appropriate exercise are recommended to control blood glucose. Fasting blood sugar needs to be lower than 5.1mmol/L and 2h postprandial blood sugar needs to be lower than 6.7mmol/L. 2. Low amniotic fluid: If you find low amniotic fluid at 35 weeks of pregnancy, you should pay attention to whether the fetal heart is normal or not, and you need to do fetal heart monitoring examination. Fetal heart accelerates obviously and varies well, which means the fetus is safer in the uterus. It is recommended that the pregnant woman should lie on her left side, drink more plain water, take oxygen appropriately and pay attention to monitoring fetal movement. Review the ultrasound after one week and pay attention to the change of amniotic fluid depth. In case of progressive decrease of amniotic fluid, cesarean delivery is recommended to terminate the pregnancy. If on the fetal heart monitoring graph, it suggests a recurrent late deceleration, or variable deceleration, acute intrauterine distress is considered and a cesarean section should be performed immediately to avoid neonatal asphyxia or death. If the amniotic fluid volume decreases, attention should also be paid to whether the pregnant woman has premature rupture of membranes, which requires immediate hospitalization for labor and can be induced either naturally or with the application of oxytocin to avoid intrauterine infection.