Sealing device for food packaging bag

The utility model provides a sealing device for a food packaging bag, which belongs to the technical field of food packaging and comprises four fixing legs, a storage box, a rotating roller, a conveying belt, a U-shaped baffle, a rotating motor and a concave frame, the four fixing legs are fixedly arranged at four corners of the device, and the storage box is welded between the two fixing legs onthe left side. A rotating roller is rotationally arranged between the left side fixing leg and the right side fixing leg, a conveying belt is arranged between the two rotating rollers in a sleeved mode, a plurality of U-shaped baffles are welded to the surface of the conveying belt at equal intervals, and a rotating motor is fixedly arranged on the outer surface of the left side fixing leg throughbolts. The hydraulic elevator is started to enable the guide block to move downwards, so that the first triangular block moves downwards, the first third angle block moves downwards to drive the second triangular block to mov