The invention discloses a detachable far-infrared heating chemical reaction kettle. The detachable far-infrared heating chemical reaction kettle comprises a kettle body, a kettle cover, a stirrer and a piston, wherein the piston is installed in the middle of the kettle body, a piston rod is installed on the piston, and the stirrer is installed in the kettle body and comprises a stirring shaft and rotary blades; a heater shell is arranged on the outer side of an upper reaction kettle body part, a silicon carbide plate layer, a radiation shielding layer and a heat insulation layer are arranged between the upper reaction kettle body part and the heater shell from inside to outside in sequence, and a resistance band is arranged between the silicon carbide plate layer and the heat insulation layer. The stirring degree of materials at the bottom of the kettle is increased through the stirrer, mixing effect is improved, sufficient contact between mixtures is maintained, reaction efficiency is improved, heat energy is generated through resistance, heating is conducted by means of the characteristics of silicon carbide of being high in heat conductivity coefficient, insulativity and mechanical strength, not prone to aging and capable of generating high far infrared spectrum, heat is absorbed by objects to be heated in the reaction kettle, and then energy is saved.