First-degree perineal laceration is not serious, it refers to the laceration of the perineal skin and mucous membrane tissue, and active suturing is sufficient. The elasticity of the perineum itself is relatively poor or the weight of the fetus is relatively large, which may lead to first-degree perineal laceration, especially in first-time mothers. The most serious is a third degree perineal fracture that leads to a fracture of the perineal anal sphincter, which will have a certain impact on defecation, so strengthen the care after the repair operation and actively observe, and actively give anti-inflammatory treatment if there is a local inflammatory reaction.