Breast pumps have a certain role in promoting lactation. The main function of a breast pump is to empty the breasts and relieve breast milk, and the sucked milk can be stored for later consumption by the baby. The mother’s milk production follows the principle of supply and demand balance, i.e. the more milk is sucked away, the more milk is produced, and the rate of milk synthesis is directly proportional to the degree of breast emptying. When a breast pump empties the breast, it promotes the secretion of lactogen by the pituitary gland, which promotes milk synthesis and fills up the breast again. At the same time, the breast pump stimulates the mother’s nipples during the sucking process, producing an effect similar to that of a baby sucking on a nipple. The stimulation produced is transmitted via the nerves to the pituitary gland, which secretes more lactogen, thereby increasing the secretion of milk. Before using a breast pump, you must first warm your breasts with a hot towel, wash your nipples with warm water, and carefully clean and disinfect the breast pump. Put the breast pump close to the breast and squeeze the ball of the breast pump to suck the milk into the breast pump through negative pressure. Finally, the sucked milk needs to be fed to the baby or stored in the refrigerator, taking care to prevent contamination. The breast pump must be cleaned and disinfected before and after use, and the negative pressure should not be too high when sucking milk, nor should it be sucked on the breast for a long time to prevent damage to the breast.