Collagen peptide-colla corii asini oral solution and preparation method thereof

The invention discloses a collagen peptide-colla corii asini oral solution and a preparation method thereof. The preparation method comprises the steps of: performing controllable enzymolysis on collagen of a deep sea fish skin which is taken as a raw material, and performing ultra-filtration separation and concentration to obtain a collagen peptide solution with the molecular weight of 500Da-1000Da; stewing and filtering main auxiliary materials of solid colla corii asini, radix polygoni multiflori preparata and radix rehmanniae praeparata to obtain a colla corii asini basic solution, a radix polygoni multiflori preparata solution and a radix rehmanniae praeparata solution; blending the solutions with adlay powder, tea polyphenols, vitamins, a vitamin E, potassium sorbate, honey and water to obtain a mixed solution; and homogenizing, filling and sterilizing the mixed solution, so as to prepare the oral solution which is rich in nutrition and easy to absorb and has a beautifying skin-caring effect simultaneously when nourishing yin and supplementing blood. The preparation method is advanced in technology, reasonable in technique, strong in operability and suitable to large-scaled production.