Casein phosphopeptide, as a “mineral carrier”, can effectively improve the bioavailability of mineral elements through its special phosphoserine structure. Studies have shown that casein phosphopeptides can chelate metal cations, forming soluble complexes, which can protect mineral elements, improve the bioavailability of mineral elements in physiological environments from neutral to alkaline environments, and avoid adverse effects caused by reactions between mineral elements and simultaneously ingested food components or other mineral elements. Casein phosphopeptides can not only promote the absorption of mineral elements, but also supplement peptides with important biological activities, and therefore have broad prospects for application and development in the fields of pharmaceutical, functional food, health food and green additives.