Full-automatic vacuum packaging machine of medium package explosives

The invention discloses a full-automatic vacuum packaging machine of medium package explosives. The packaging machine comprises a material pushing device, a film molding sleeve, a heat sealing and cutting device, a vacuumizing and heat sealing device and a material conveying device, wherein the material pushing device, the film molding sleeve, the heat sealing and cutting device and the vacuumizing and heat sealing device are sequentially arrayed according to a production process; the material pushing device is arranged below the film molding sleeve and passes through the vacuumizing and heat sealing device; the film molding sleeve is of a double-layer structure with an opening at the top end and consists of an inner wall and an outer wall; the cross sections of the inner wall and the outer wall are in a U shape, and a gap ensuring that a seal bag with a U-shaped opening is formed after a film passes through the U-shaped structures of the inner wall and the outer wall is preserved between the inner wall and t