The daily intake of soy milk after pregnancy should not exceed 500mL, soy milk contains a variety of nutrients, the benefits of daily intake of soy milk mainly include the following aspects: 1, promote brain development: soy milk is rich in protein, and the main component of the brain is protein, daily soy milk intake is conducive to the development of the fetal brain; 2, promote bone growth: soy milk contains calcium elements, which helps the formation of fetal bones 3, prevention of anemia: soy milk is rich in iron, zinc and other minerals, for the prevention of iron deficiency anemia in pregnant women has a certain role; 4, reduce the incidence of disease: regular consumption of soy milk can regulate the level of estrogen and progesterone, for the endocrine system has a regulatory role. Daily intake of the right amount of soy milk is beneficial to both the mother and the fetus, but excessive intake of soy milk may have adverse effects, especially sugar-sweetened soy milk, excessive intake can lead to weight gain in pregnant women, which is not conducive to a smooth delivery. In addition, the gastrointestinal peristalsis slows down during pregnancy, prone to indigestion, and soy milk tends to increase the amount of gas production, intensifying intestinal flatulence, so it is also not advisable to drink too much.