Full-automatic vacuum packaging machine

The utility model provides a full-automatic vacuum packaging machine which comprises a base, a U-shaped installation frame arranged at the top of the base, a vacuum pump arranged at the top of the U-shaped installation frame, an exhaust pipe arranged at the top of the vacuum pump, a negative pressure pipe arranged at the bottom of the vacuum pump and a U-shaped plate arranged in the U-shaped installation frame. An adsorption head is installed at the bottom of the U-shaped plate, the negative pressure pipe is connected with the adsorption head, first electric push rods are installed on the two sides of the top of the U-shaped plate, the tops of the first electric push rods are fixed to the U-shaped mounting frame, second electric push rods are installed on the two sides in the U-shaped plate, and sealing plates are fixedly installed at the free ends of the second electric push rods; a containing groove is formed in the side, close to the adsorption head, of the sealing plate, and the adsorption head is arrange