Abstract: My country is both a big country of livestock breeding and a big fishery country, and it has abundant resources such as animal bones, animal skins and fish bones, fish skins and fish scales. Collagen peptides are derived products obtained by enzymatic or thermal hydrolysis of collagen. Because of its good biocompatibility, degradability, plasticity, thermal stability, flexibility, absorbency, solubility, water retention, anti-oxidation, weak antigenicity and other advantages, it is widely used in food, medical, and skin care, feed and other industries. In this paper, the raw material sources, extraction methods and applications of collagen peptides are reviewed. At the same time, feasible solutions are proposed for the problems existing in the production and manufacturing of collagen peptides, and the research direction of collagen peptides in the future is also predicted in order to provide reference for the further development of collagen peptides.