Ultrasonic scalpel is a kind of high-frequency electrosurgical equipment, which is mainly used for biological tissue cutting and vascular closure. It has the characteristics of less bleeding, less damage to the surrounding tissue, and quick recovery after operation. It can cut and coagulate the human tissue, and will not cause side effects such as tissue drying and burning. When the knife head works, there is no current passing through the human body. It is widely used in the operating room, and it is known as bloodless scalpel.