Explosion-proof high-pressure reactor and using method thereof

The invention discloses an explosion-proof high-pressure reactor and a using method thereof, which relate to the technical field of chemical equipment. The explosion-proof high-pressure reactor comprises a kettle body and a plurality of supporting legs, the supporting legs are fixedly connected with the lower surface of the kettle body, and a reaction cavity and a condensation cavity are formed inthe kettle body. By using the pressure reduction box, the backflow channel, the condensation cavity, the reaction cavity and the spiral blades, high-pressure gas can be generated in the reaction cavity along with temperature rise, then high-pressure hot gas can enter the pressure reduction box, the air pressure in the reaction cavity is preliminarily reduced, and the air pressure in the pressurereduction box also reaches a threshold value along with continuous reaction; at the moment, cold water is introduced into the condensation pipe for heat exchange, high-pressure air in the pressure reduction box is rapidly cool