The multi-layer co-extrusion blow-thinning production line adopts a new type of high efficiency and low energy consumption extrusion unit, IBC film bubble internal cooling system, ±360° horizontal upward traction rotation system, photoelectric automatic deviation correction device, automatic winding and film tension control, computer screen automatic Advanced technologies such as control systems. Compared with similar equipment, it has the advantages of higher output, good product plasticization, low energy consumption, and simple operation. It completely solves the problems of film ruffles and winding heads, and brings product quality to a new level. The produced film has high transparency, puncture resistance, high toughness, good low-temperature heat-cutting properties, good composite fastness and anti-curling properties. This kind of film can be widely used in light and heavy packaging due to its good barrier properties, freshness, moisture resistance, frost resistance, oxygen barrier and oil resistance. Such as various fresh fruits, meat products, pickles, fresh milk, liquid beverages, medical supplies etc.