Body weight control during pregnancy should be managed through dietary control and exercise, no additional increase in energy is needed in early pregnancy, but after 4 months of pregnancy until the expected date of delivery, the calories should be increased by 200kcal per day on top of the original basis, and pregnant women should consume 200-450g of staple food per day. in addition, the intake of high-quality proteins should be increased, and attention should be paid to the supplementation of multi-vitamins and minerals, and attention should be paid to the increase of the amount of vegetables rich in dietary fiber and low-sugar fruits and coarse grains. Dietary fiber-rich vegetables, low-sugar fruits and coarse grains. Pregnant women should increase muscle strength through exercise to promote the body’s metabolism, and pregnant women with a normal body mass index should not gain more than 16kg during pregnancy.