The utility model relates to a carrying out physics or chemical reaction auxiliary device's technical field, especially relating to a reaction kettle, the interior reaction temperature of its steerable reaction kettle reduces and uses the limitation, it is more abundant to material mixing, improve work efficiency, and it is convenient to wash, improves it and use the reliability, the reactor comprises a kettle, a pedestal, including a motor, an end cap, a controller, and a cover plate, drive axle and stirring leaf, the internal working chamber that is provided with of cauldron, be provided with first inlet pipe on the cauldron body, the second inlet pipe, sampling tube and discharging pipe, cauldron body top is provided with clearance mouthful and is provided with the kettle cover in a clearance mouthful department, left side wall and right side wall are provided with left baffling board and right baffling board respectively in the working chamber, still include the temperature controller, the heating rod, temperature -sensing ware and intelligent display screen, and temperature controller, temperature -sensing ware and heating rod all are located the working chamber, the assemblypulley is installed to the base bottom, cauldron body internal plant is provided with glass -lined coating, still include the screwed pipe, spiral shell rasp bar, ball bearing, the connecting pipe, stay tube and spray line.