Preterm labor is defined as regular contractions, progressive opening of the uterus and lowering of the fetal previa at 28 weeks of gestation but less than 37 weeks. The earlier the period of preterm labor, the more immature the fetus is and the higher the risk is. If there is abdominal pain and increased vaginal discharge, it is recommended that pregnant women pay attention to the fact that it may be a sign of preterm labor, so it is best to go to the hospital for examination in time. If the opening of the uterus is already 3-5 cm, it is not easy to keep the fetus and it is very likely to deliver prematurely. If there is no contraindication to vaginal delivery, we should actively improve all auxiliary examinations and closely monitor the fetus in utero. If there is no abnormality, there is no need to worry too much and normal delivery is possible. If the opening of the uterus has not yet occurred, it is possible to carry out birth control and control the contraction of the uterus in order to allow the fetus to continue to grow and develop.