The infant stage is an important period of human growth and development. Scientific feeding and balanced diet are crucial to the healthy growth of infants and young children. Only about 40% of infants aged 0-6 months in the world are exclusively breastfed, and only one-third of infants in my country are exclusively breastfed. The child is adequately breastfed. Infant formula milk powder, as a substitute for breast milk, is also the first food for infants and young children. At present, the quality indicators and evaluation standards for infant formula milk powder at home and abroad are based on the total protein content, whey protein and casein ratio, etc., which are close to breast milk. However, they have not yet reflected the freshness of breast milk from the mother's breast directly to the baby's mouth. evaluation method. Therefore, the National Dairy Science and Technology Innovation Alliance built a multi-dimensional model based on the thermal processing by-product furoline and active proteins α-lactalbumin and β-lactoglobulin to calculate the freshness (Freshdegree, FD) and form a freshness measurement standard as Methods for evaluating the freshness quality of infant formula milk powder.