The invention discloses a pure natural cerebroprotein hydrolysate raw material preparation method. The method comprises the steps as follows: a, protein purification, to be specific, a cryopreserved fresh pig brain is defrosted, cleaned, homogenized, and subjected to centrifugal separation for obtaining precipitated brain protein; b, pepsin enzymolysis, to be specific, pepsin is added in the precipitated brain protein and stirred, then concentrated hydrochloric acid is added and stirred, and then the centrifugal separation carried out, so that a pepsin enzymatic hydrolysate is obtained; c, acid hydrolysis, to be specific, sulfuric acid is added into the pepsin enzymatic hydrolysate for hydrolyzing, so that an acid hydrolysis liquid is obtained; d, trypsin enzymolysis, to be specific, the pH value is adjusted to 7-9, and pancreatin with the weight 0.1% to 0.4% of that of the pig brain is added for hydrolyzing, and the centrifugal separation is carried out, so that a pancreatin enzymatic hydrolysate is obtained; e, chromatography, to be specific, the pH value is adjusted to 6.5-7.5, and resolving is carried out by using ammonia water, so that a chromatography liquid is obtained; f, concentration, to be specific, the vacuum concentration is carried out, the pH value is adjusted to 6.5-7.5, and then frozen storage is carried out; g, impurity removing, to be specific the condensed frozen liquid is defrosted, and then subjected to centrifugal separation as well as ultrafiltration for obtaining natural cerebroprotein hydrolysate raw material.