High-pressure gas tank for heating efficiently

The invention discloses a high-pressure gas tank for heating efficiently. The high-pressure gas tank comprises a tank body, and the tank body is provided with an exhaust opening. The high-pressure gas tank is characterized in that the outer wall of the tank body is provided with a covered groove, the groove is covered with a sealing membrane layer, and an airtight heating cavity is enclosed by the sealing membrane layer and the groove. The heating cavity internally comprises a non-woven bag, and the non-woven bag is filled with a heating composite layer. The position between the bottom of the non-woven bag and the bottom of the groove is further provided with at least one flexible belt, and a plurality of protruding blocks are embedded to the surface of each flexible belt. The two ends of each flexible belt stretch out of the other side of the non-woven bag. When the tank body inner pressure is insufficient, the sealing membrane layer can be torn off, the oxygen gas enters the heating cavity to react with hea