Abstract: Salted duck egg white is a by-product of duck egg processing and high-quality proteins with high nutritional value and good processing properties.However a large amount of salted duck egg white is discarded every year,resulting in a waste of egg resources and polluting the environment at the same time. And only a small amount of salted duck egg white is added to the feed currently.The research of salted duck egg white is summarized in this paper,and aims to provide a reference and theoretical basis for the high value utilization of salted duck egg white,leading to be a useful reference for the reuse of salted duck egg white.