This machine adopts ultrasonic welding system to weld the ear-loop automatically on mask body. The whole machine is made of aluminium alloy structure with no rust, PLC micro computer control, high stability The fabric is pulled forward by the pulling wheel to lift the swing rod, which is equipped with a displacement sensor. When the swing rod is lifted and the metal induction plate is rotated to leave, the frequency converter sends a signal, and the motor rotates to transport the fabric to realize the automatic control of tension feeding.