Abstract: This article introduces on the composition of whey protein and important biological functions; Discusses on the use of whey protein biological value and in sports nutrition, health care and food processing, the broad application prospects; Hydrolyzed whey peptides with bitterness, the need for a micro-capsules made after spray drying, and its amino acid composition excellent absorbent good digestion, and many other advantages widely used in many fields. The issue according to a certain formula dose of whey peptide powder feeding mice converted into equivalent to the amount of the dose, in a certain period of time and then continued to eat rats, rats and biochemical indicators of the final, thus taking scientific judgement on human After the function of the health effects. The whey powder peptide features, a variety of functional assessment: Enhance immunity evaluation; alleviate physical fatigue functional evaluation; regulating intestinal flora functional evaluation; supporting anti-tumor function evaluation; antioxidant function evaluation; cholesterol-lowering functional evaluation and support weight reduction.