The invention relates to a packing bag composite film folding pasting and spot hot press device. The device comprises a pressing device and a folding device; and the folding device is arranged on the front side of the pressing device. The device is characterized by further comprising a folding pasting device and a seal hot press device; the folding pasting device is arranged on the front side of the folding device; and the seal hot press device is arranged on the front side of the folding pasting device. The device has the advantages of capability of improving the precision of adjusting the position of spot hot press of one layer of continuous bag body materials in continuous production, incapability of generating hard impact to square-bottom packing bags in spot hot press of the square-bottom packing bags and capability of reducing damage of the square-bottom packing bags.