The offline Low-E coated glass production line will include a loading area, a coating area, and a lowering area located on the frame. The loading area includes a manual loading station, a first automatic loading station, and a second automatic loading station that are connected in sequence. Film table, cleaning film feeding roller, cleaning machine and clear film feeding roller. The coating area includes a vacuum chamber and magnetron sputtering equipment located in the vacuum chamber. The lower film area includes The film output roller conveyor, automatic film unloading machine and manual film unloading table have a reasonable layout design to achieve the effect suitable for large-area production of Low-E coated glass.