The utility model discloses an explosion-proof heat sealing machine which is composed of a machine base, an upright post A heat sealing device comprises an explosion-proof type self control electrical bar. The electrical bar is sealed in a heating rod body. A heat-insulating layer is wrapped outside the heating rod body. The electrical bar, the heating rod body and the heat-insulating layer are fixed with a lower heat sealing body. The upper part of the heat-insulating layer is provided with a longitudinal notch so that the upper part of the heating rod body can be exposed and stitched with an upper heat sealing body. The utility model has the advantages of simple structure, convenient manufacture, disposable targeting heat source, firm and reliable heat sealing and obvious and beautiful figures. The explosion-proof heat sealing machine can be free from the factors of geography, temperature and installation directions.