This production line is a fully automatic one-to-two mask machine, one body machine drives two ear band machines. After the main body machine outputs the mask body, the mask body sheet is conveyed to the turning mechanism by a conveyor belt structure. The reversing mechanism is used to flip the mask plate onto the belt connected to the ear band machine, and then the mask sheet is conveyed to the first mask plate on the front of the ear band machine through the conveyor belt, and finally the mask sheet is placed on the ear band by the cylinder pressing In the mask plate of the machine, the ear band machine is used to complete the welding of the ear bands of the mask and the edging, thereby completing the production of an ear band mask product. This machine adopts PLC, touch screen control, single-phase motor for main conveyor belt, stepping motor turning, precise transmission, stable control and adjustable speed.