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The multi-layer coextrusion (up blowing rotary traction) film blowing machine has a horizontal ± 180 degree swing rotation, scientific and reasonable structure, energy saving and easy maintenance. Instead of the die head rotation, the die head structure is simplified, and a series of problems such as long flow channel of the rotating die head, difficult melt sealing, easy material leakage, uneven heating, difficult maintenance, large film thickness tolerance and so on are completely solved. The difficulty of compounding and production process control of multi-layer coextrusion products is simplified. It can increase the membrane bubble internal cooling system and produce film products with higher transparency and better physical properties. The film produced by this technology has extraordinary flatness and precise film winding and column fixation, which meets the requirements of high-precision and high-speed printing.