Amniotic fluid embolism is a very serious complication in obstetrics. Once it occurs, the maternal mortality rate is very high, and some physicians even believe that women almost always die when amniotic fluid embolism occurs. So, how to prevent amniotic fluid embolism? The following are the preventive measures of amniotic fluid embolism: 1, the reasonable use of contraction agents, to prevent contractions too strong, for stillbirth and premature rupture of membranes should be more cautious. 2, strictly master the indications of amniocentesis, use fine puncture needle, the technique should be skilled and accurate. Avoid repeated punctures. 3.Use contraction inhibitor as appropriate for emergency delivery or excessive labor force. In case of hypertonic contractions, break the membrane during the interval of contractions and release the amniotic fluid as much as possible. 4.Strictly grasp the indications for cesarean section, membrane stripping, membrane breaking, cervical dilation and other procedures. Artificial rupture of membranes should be carried out between contractions. The fetal head should be delivered after the amniotic fluid is sucked out as much as possible during cesarean delivery. 5. Avoid traumatic vaginal surgery, such as high school forceps and difficult fetal destruction.