Preparation method of infant formula milk powder capable of retaining natural biological activity

The invention belongs to the field of dairy product processing, and discloses a preparation method of infant formula milk powder capable of retaining natural biological activity. The method comprisesthe following steps: taking raw milk, and carrying out centrifugal separation, primary microfiltration sterilization, mixing, secondary microfiltration sterilization, grease online addition, homogenizing, evaporation concentration, spray drying and fluidized bed cooling drying. According to the invention, the whole process from milking to powdering is controlled within 2 hours; meanwhile, the heattreatment intensity in the production process is reduced, so that the activity of lactoferrin, IgG, peroxidase and lysozyme in the fresh milk is kept at 80% or above, the biological activity of immune components in the milk is effectively kept, and the immune index of the infant formula milk powder is improved. The method is used for producing the infant formula milk powder. 本发明属于乳品加工领域，公开了一种保留天然生物活性的婴幼儿配方奶粉的制备方法，是取原料牛奶经离