Collagen peptides(CPs) emerging as a new functional protein ingredients,were developing rapidly at home and abroad in recent years.In order to scientifically guide the industry crowd engaged and concerned about the CPs and promote the healthy and sustainable development of the CPs industry,the CPs definition,properties,preparation technology as well as current situation of domestic and foreign CPs industry were reviewed in this paper.And the three questions which concerned about by the downstream production enterprises and consumers during the promotion process of CPs,including the relationship between raw material sources and CPs product quality,the relationship between CPs efficacy and molecular weight,and the applied laws and regulations of CPs,were clarified.Finally,the research and development trends of CPs were prospected.