Automatic vacuumizing grain storage barrel

The utility model discloses an automatic vacuumizing grain storage barrel which comprises a cover plate and a barrel body, an exhaust hole is formed in the cover plate, a control circuit board, an air pressure detector, a T-shaped communicating piece and an air pump are installed in the cover plate, a fixing base is installed on the inner side of the edge of the barrel body, and the cover plate is rotatably connected with the fixing base. A magnetic component is arranged on the side, close to the cover plate, of the fixing base, and a magnetic switch used for being matched with the magnetic component is installed on the cover plate. According to the grain storage barrel, special mold opening design does not need to be conducted on the barrel body and the cover plate, the mold opening cost and the design cost are saved, in addition, due to a non-contact triggering mechanism of the magnetic component and the magnetic switch, even if the grain storage barrel is used for a long time, the working efficiency of the