The three-layer coextrusion film blowing machine and the three-layer coextrusion film blowing production line adopt new high-efficiency and low-energy consumption extrusion unit, IBC film bubble internal cooling system, ± 360 ° horizontal up traction rotation system, photoelectric automatic deviation correction device, full-automatic winding and film tension control, computer screen automatic control system and other advanced technologies. Compared with similar equipment, it has the advantages of higher output, good product plasticization, low energy consumption and simple operation, completely solves the problems of film ruffle and winding head, and improves the product quality to a new level.