Undenatured chicken type ii collagen is an important protein, which is widespread in animals, especially in connective tissues such as bone, skin, cartilage, ligaments, etc. It has the role of maintaining tissue structure stability, promoting cell growth and repair. In the medical field, Undenatured chicken type ii collagen is widely used in the preparation of artificial skin, bone repair materials, drug sustained-release systems and other biomedical products. Moreover, it is also used for the preparation of biomedical materials and medical devices due to its low immunogenicity and good biocompatibility.