The composition of soybean peptide is almost the same as that of soybean protein, and it also has the characteristics of balanced amino acid ratio and rich content. Compared with soybean protein, soybean peptide has many advantages. First, soybean peptide has the characteristics of no beany smell, no acid precipitation, no solidification when heated, and easy solubility in water. Secondly, soybean peptide has a good absorption rate in the intestine, and its digestion and absorption are better than soybean protein. Finally, soybean peptides have active groups that can effectively combine with calcium and other trace elements, and can form organic calcium polypeptide complexes, which can significantly improve solubility, absorption rate and delivery speed, and can promote passive absorption of calcium.