The mould of plastic impeller ultrasonic welding machine is composed of the upper ultrasonic mould head and the lower tooling. The material of the upper mould is 7075 aluminum and the material of the lower mould is 6061 aluminum. The tooling processing cycle is 5 days. Plastic ultrasonic welding machine welding impeller machining efficiency is high, suitable for factory production processing, the operation is simple, just need to product assembly, press the start button, equipment under set parameters, hot pressing, welding surface firmly off Velcro ultrasonic welding machine equipment warranty 1 year, ultrasonic welding mold warranty is 3 months.