The incidence of lateral incision and perineal laceration in normal labor can be reduced to a certain extent by measures such as perineal massage during pregnancy, scientific exertion during labor, exercising the pelvic floor muscles and controlling fetal weight. 1. Perineal massage during pregnancy: first, wash your hands thoroughly, take the lithotomy position, apply massage oil around the perineum, insert your thumbs as deeply as possible into the vagina, and press the perineum in the direction of the rectum until there is a slight burning or painful sensation. 2. Scientific exertion during labor: generally in the process of labor there are midwives will be accompanied by the midwife, at this time should listen to the midwife’s command, in the fetus is not delivered, you should take a deep breath, grasp the sides of the delivery bed, make a long force downward force, and in the delivery of the fetal head should be avoided to avoid the force of the birth of the birth canal cracks. 3. Exercise the pelvic floor muscles: exercise the pelvic floor muscles can increase the elasticity and flexibility of the pelvic floor muscles, reduce the chances of lateral incision during labor, tighten the anus and vagina for 8-10 seconds and then relax, it is recommended that at least 3 groups per day, not less than 200 times. 4. Fetal weight control: large fetus is one of the important causes of obstetric laceration and lateral incision, it is recommended to control the fetal weight at about 3000g during pregnancy. If the condition of perineum is poor, the fetus is large, or there is fetal distress and the fetus needs to be delivered as soon as possible, perineal lateral incision should be performed under the advice of midwife.