Heat sealing device for medical packaging bag

The utility model discloses a medical packaging bag heat sealing device which comprises a bottom frame, the upper surface of the bottom frame is fixedly connected with an installation frame, the upper surface of the installation frame is provided with a pressing mechanism, the pressing mechanism comprises a pressing sleeve, the outer side wall of the pressing sleeve is provided with a flattening mechanism, the upper surface of the bottom frame is provided with a bearing mechanism, and the bearing mechanism is provided with a clamping mechanism. By arranging a pressing mechanism and a flattening mechanism, when a piston rod of an air cylinder extends to drive a pressing sleeve to descend and a flattening roller makes contact with a packaging bag seal on the upper surface of a lower heating strip, a clamping hinge rod rotates, the flattening roller moves from the center to the two sides, the packaging bag seal is flattened, and the pressing sleeve continues to descend; the clamping hinge rod is attached to the