The invention discloses an
earthworm protein for reducing
blood sugar and
blood pressure and eliminating diabetic complications. The
earthworm protein is prepared by adopting the following steps of: 1) cleaning earthworms, namely, selecting live earthworms, removing impurities and dead earthworms, putting the live earthworms into water of which the PH value is 4 to 5.8 for 10 to 15 minutes, meanwhile, adding 50 g of salt, leaching the cleaned live earthworms, and flushing the live earthworms by using
warm water of 28 DEG C to remove redundant
moisture and impurities on the outer surfaces; 2) pulping; 3) filtering or centrifuging the homogenate obtained in the step 2) to remove rough residue therein, and filtering the residue removed homogenate to obtain clear liquor, wherein each milliliter of the clear liquor contains more than 180
enzyme activity units; putting the clear liquor into a disinfected container, injecting high-pressure CO2 gas, mechanically and fully stirring the clear liquor to be treated for 3 to 8 minutes, and releasing pressure through a conduit, wherein the
solubility of CO2 is quickly reduced after the pressure is reduced; then filtering to remove impurities, and
settling for 12 hours to obtain supernate; and 4) freeze-
drying, namely
drying the supernate in a freeze drier of 28 DEG C below zero to obtain a powdery product, wherein each milligram of the product contains 2,000 to 3,000
enzyme activity units.