Protein is one of the most important and most abundant components next to water in the living body, and it is also one of the main components in foods. In meat and meat products, proteins and amino acids are not only the main nutrients, but also are the material basis of food texture, lfavor and color; besides, they have multiple functions, just like emulsiifers, gelling agents and stabilizers. Therefore, protein degradation in meat and meat products will greatly affect the quality. This article summarizes the main types of meat protein, changes in the structure and composition with protein de...