The maternal body and mind in warm water are relatively calm and relaxed, and the secretion of stress hormones produced in the body that cause the increase of blood pressure and the prolongation of labor will be reduced. The buoyancy of water can relax people's muscles and use more energy for uterine contraction, which can accelerate the labor process and shorten the time of giving birth to a baby. It is urgent for more women to reduce the pain of childbirth and popularize water delivery.