Soymilk, as a food, can provide the body with a variety of nutrients when consumed in moderation during breastfeeding. If consumed in excess, it may cause gastrointestinal discomfort such as flatulence. Soymilk is a food rich in nutritional value, it is rich in high quality vegetable protein, as well as vitamin B1, vitamin B2, fat, calcium, phosphorus, iron and other minerals, moderate consumption of which can provide the body with a variety of nutrients. Protein in soymilk is the main nutrient for tissue formation and growth, vitamins contribute to normal energy metabolism, and fat assists in the absorption of fat-soluble vitamins and provides essential fatty acids. However, it should not be consumed in excess to avoid gastrointestinal discomfort such as flatulence. In addition, breastfeeding is recommended to eat a light and nutritious diet, with a reasonable mix of coarse and fine grains, meat and vegetables. Appropriate exercise, regular work and rest, and maintain a happy mood.