This Full-automatic High-speed Three/Four side sealing stand up bag making Machine which is suitable for producing two-layer or multi-layer three/four side sealing laminated film stand up bags (bags for food, washing powder ,drug, seed, garment ,sweets, etc.) which take BOPP, PET, CPP, PE, nylon, aluminum foil and paper as base material. With such characteristics as easy operation, smooth product, stiff and smooth and beautiful appearance, high-strength thermal edge sealing and high pouch making speed, it is a kind of ideal equipment for packing and making bags