This series of heat sealing machine is suitable for the ventilating bag, plastic film and its composite film as the packaging material of the packaging bag need to be hot sealing or external vacuuming and inflating the verifiable heat sealing machine, mainly meet the various industrial enterprises, biological pharmaceutical factories, medical supplies and other production units for all kinds of items for the heat sealing of packaging bags. Heat seal quality fully meet the domestic and international standards or GMP certification requirements, design standards in line with IP65 related requirements. It integrates the functions of pumping, inflating, heat sealing and cooling.