Abstract:Freezing is one of the most commonly used technology in food for long-time preservation and storage.Nucleation and crystallization of water in food play a crucial role in the freezing efficiency and the quality of frozen foods during the freezing process.Ultrasound-assisted freezing as an emerging freezing technology which could effectively induce nucleation and control the crystallization process and enhance the frozen food quality during food freezing，has been payed more and more attention by researchers.In this article，the mechanism of ultrasound -assisted freezing and the factors influencing the freezing effects were introduced，and the development of its application in food freezing were reviewed.The paper aims to provide the reference to the further studies and applications of ultrasound-assisted freezing in food industry.