Convenient food outer packaging bag sealing device

The utility model discloses a convenient food outer packaging bag sealing device which comprises a base, a sealing assembly is arranged at the top end of the base and used for sealing a packaging bag, a shell is arranged outside the sealing assembly, and a gas purification assembly is further arranged inside the shell. The sealing assembly comprises a sealing bottom plate, and the two ends of the sealing bottom plate are fixedly connected with side plates. According to the convenient food outer packaging bag sealing device, in the packaging bag sealing process, a sealing pressing block is matched with a rubber pad to tightly compact a bag opening, then heat sealing is started from the pressed position through a heat sealing sleeve, toxic gas entangled by hot air is prevented from entering a packaging bag, food in the packaging bag is prevented from being polluted, and potential food safety hazards are avoided; and the guide connecting rod drives the rotating connecting rod and the connecting rod to move synch