Tea can be consumed in small quantities during breastfeeding, but excessive consumption is not recommended. Lactating women should not drink too much tea because it will affect the normal physiological activities of the fetus and the mother. After the high concentration of tannins in tea enters the blood circulation, breastfeeding women’s milk secretion will be inhibited, resulting in insufficient milk secretion. In addition, tea contains caffeine, lactating women drink tea, caffeine will enter the breast milk, and then reach the baby’s body, the baby’s metabolism of caffeine is very slow, excessive accumulation may lead to insomnia and agitation of the baby, affecting the development of the fetal nervous system. Lactating women should avoid drinking tea, daily diet should strengthen the intake of calcium, iron, vitamins, to prevent anemia, supplement high-quality protein, eat more fresh fruits and vegetables, reduce high salt and high oil food intake, to ensure that the baby’s normal nutrition.