The invention discloses an aseptic collagen liquid with
biological activity and a preparation method thereof. The preparation method of the aseptic collagen liquid comprises
degreasing,
slicing, disinfecting and crushing at a low temperature animal tendons, carrying out
acid dissolution and enzymolysis, carrying out
filtration to remove residues, and carrying out
salting-out, purification, loading, sealing,
refrigeration and low temperature
irradiation sterilization to obtain the aseptic collagen liquid. The preparation method realizes low temperature
irradiation, keeps collagen activity, and prevents collagen inactivation and denaturation or cross-linking reaction under
irradiation so that functions are not influenced. The preparation method utilizes
ultrafiltration purification to replace the traditional
dialysis purification, shortens purification time, utilizes an automatic
system to replace the traditional semi-automatic operation, prevents human hand
pollution and guarantees product cleanliness, purity and bioactivity.