Abstract:The main reason for human's lacking of calcium is the low rate of absorption. The calcium in food is digested in the stomach and occur chelate reaction with the amino acids，Then absorb by calcium amino acid chelate.This absorption process is influenced by VD，protein and amino acid content.It is very slowly to converse calcium through metabolism in human body and it is difficult to control.Therefore，it is important to come up with new method to enrich the calcium in human's daily consumption of food.