Stable high-calcium soybean milk powder and preparation method thereof

The invention discloses stable high-calcium soybean milk powder and a preparation method thereof, and belongs to the technical field of food processing. The method comprises the steps of soybean fine selection, cleaning, soaking, coarse grinding, fine grinding, filtering and deslagging, enzyme deactivation, fishy smell removal, phytase enzymolysis, blending, sterilization and enzyme deactivation, high-pressure microjet, vacuum concentration, spray drying, crushing and collection, packaging, inspection and the like. Vacuum deodorization is adopted, so that the beany flavor in the soybean milk powder can be effectively removed; and through phytase enzymolysis, phospholipid wrapping and high-pressure microjet treatment, the wettability, dispersity and solubility of the high-calcium soybean milk powder are improved, and the obtained high-calcium soybean milk powder is easy to brew, good in calcium suspension stability and excellent in taste and flavor. The non-transgenic soybeans are selected, and cane sugar is n