The ultrasonic seamless suture system consists of a 35k ultrasonic transducer, amplitude rod (fixed action), a disc-type welding head and a matching special CNC power supply combination. Ultrasonic CNC power supply converts the mains power into 35k high-frequency high-voltage AC power and supplies ultrasonic transducers. The ultrasonic transducer converts electrical energy into mechanical energy (ultrasonic waves). The transducer generates amplitude when performing telescopic motion in longitudinal direction, and then passes it to the disc-type welding head through the amplitude variable rod. This makes the disc-type welding head welded, equipped with a frame, pressing wheel, auxiliary structure and control components, which is a complete ultrasonic cutting sewing machine.