With a fully automatic production line, face mask ear loop welding machine fuses the elastic band on both sides of the mask through ultrasonic system to finish the production of ear loop mask. Only one operator is involved in the process to place the face masks piece by piece on the fixture of conveyor belt and the other following operations are all completed by the machine automatically. The machine features higher output than the average ear loop welding machine, PLC program control, high stability and low failure rate. Made of aluminum alloy, the whole machine is beautiful and does not rust. Photoelectric detection reduces the error rate. Welding strength of the ear loop is adjustable.