This paper discusses the mechanism of ultrasonic waves, summarizes the application of ultrasonic technology in the protein extraction, sterilization, thawing, tasty and frozen food processing in a single process, and compares it with the corresponding conventional techniques to analyze the advantages of ultrasound technology. Focusing on the ultrasound technology in the whole process of food processing, the application of ultrasonic technology is proposed in the future prospects and outlook of new technologies in food processing.