Inflation film cutting device and inflator

The utility model discloses an inflation film cutting device and an inflator. Relating to the field of aerators, wherein the blade is horizontally arranged on one side of the inflation tube, and the limiting seat is arranged above the blade. A roll film is arranged on the inflation pipe in a penetrating mode, a limiting part is arranged on the limiting base, when the roll film passes through the limiting part of the limiting base, the tension of an inflation channel of the roll film is increased, meanwhile, the upper film and the lower film on the two sides of the roll film heat sealing line are separated, and the blade acts on the film, located on one side of the roll film heat sealing line, of a cutting opening of the inflation channel. By arranging the limiting seat, the tension of theinflation channel is increased when a rolled film passes through the limiting part, and the blade only cuts the film on one side of the heat sealing line of the rolled film and does not cut the film on the other side of the h