Sealing device for packaging bag

The utility model discloses a sealing device for a packaging bag, which comprises a device platform and an equipment box, the equipment box is arranged above the device platform, and the equipment box is fixedly connected with the device platform through screws; the sealing table is arranged at the front end of the equipment box and fixedly connected with the device platform through screws, a heat sealing plate is arranged above the sealing table, pressing frames are symmetrically arranged on the two sides of the sealing table correspondingly, the pressing frames are fixedly connected with the device platform through screws, and the two pressing frames are located on the two sides of the front end of the lower portion of the heat sealing plate correspondingly; and a pressing box is arranged below the pressing frame. The capacity of compressing and flattening the sealing part of the packaging bag is achieved, and therefore the problems that when the packaging bag is subjected to sealing packaging, due to the i