The present invention relates to a method for preparing enzyme powder, and the method is characterized in that a blueberry enzyme is prepared by using byproducts, such as blueberry pomaces or blueberry wine dregs, in the blueberry processing industry. The method comprises treatment processes of pretreatment, enzymolysis, fermentation, drying, etc. The enzyme powder prepared by the method not only has abundant proteases, lipases, amylases, cellulases, superoxide dismutase, metabolites and a large number of probiotic cells, but also has health care functions of blueberries. The preparation method shortens the fermentation time of the enzyme to several weeks via employing a modern pure-strain mixed fermentation technology, compared with conventional fermentation methods of which the fermentation time ranges from several months to 1 year. The enzyme prepared by the method has a higher nutritional value (the active enzyme content is higher than that of conventional fermentation methods) and a stable quality. The enzyme powder fills gaps in the prior art, and has higher nutritional values and health-care efficacy. The enzyme powder has medical values and health care functions after long-term consumption, such as, expelling toxins and beautifying, softening blood vessels, improving microcirculations, improving antioxidant capacity of a body, deferring senescence, etc.