Heat sealing and cutting mechanism of packaging materials and hot cutting method thereof

The invention discloses a heat sealing and cutting mechanism of packaging materials and a hot cutting method thereof. The heat sealing and cutting mechanism comprises an upper heat sealing knife group, a lower heat sealing knife group, a pricking pin, a cutting knife and a driving component. An air bubble film is put between the upper heat sealing knife group and the lower heat sealing knife group, the upper heat sealing knife group and the lower heat sealing knife group can be driven to close by the driving component, in a closing process, the pricking pin makes contact with the air bubble film first, an air bubble unit in a heat sealing area of the air bubble film is pierced to deflate by the pricking pin, after the upper heat sealing knife group and the lower heat sealing knife group are completely closed, the air bubble film is tightly pressed by the upper heat sealing knife group and the lower heat sealing knife group, heat sealing can be performed on the heat sealing area of theair bubble film by a heat