Preservative sealing device

The utility model discloses a preservative sealing device, and relates to the technical field of sealing. The preservative sealing device comprises a mounting base, a chain transmission belt is mounted on the upper surface of the mounting base, a plurality of mounting plates are rotationally connected to the outer surface of the chain transmission belt in sequence, a packaging bag is placed on the fixing base through the arranged fixing base, fixing blocks and clamping blocks, and a push rod can push the clamping blocks to move towards the packaging bag; compared with the prior art, the packaging bag sealing device has the advantages that the packaging bags can be effectively prevented from toppling over in the conveying process by clamping the sealing positions of the packaging bags, so that the sealing efficiency can be improved by increasing the conveying speed of the packaging bags, and the packaging bags are prevented from falling over while being clamped. The sealing position of the packaging bag can in