The invention discloses a movable stirring device of a reaction kettle. The movable stirring device comprises a base plate, threaded support rods and an upper lifting cover; the base plate is provided with the threaded support rods, and a synchronous connecting belt is connected between the threaded support rods; the right side of the bottom plate is provided with a first motor; a threaded lifting block is arranged on the periphery of each threaded support rod, the upper lifting cover is arranged between the threaded lifting blocks, and the lower end of the upper lifting cover is provided with a sealing pad, a rotating shaft, a transmission gear, a transmission chain, a fixation piece and a rotating handle; the middle of the upper lifting cover is provided with a stirring shaft, the upper lifting cover is provided with a second motor and an air pump, and the stirring shaft is provided with a stirring fan blade rod, a rotating bearing, a rotating support block, a nozzle, a support pad block, a movable pad block and a rotating sleeve ring; a connecting air pipe is arranged between the air pump and the rotating sleeve ring, and the lower end of the base plate is provided with universal wheels. According to the movable stirring device of the reaction kettle, the upper cover which movably ascends and descends can be flexibly adjusted according to the size of the kettle body, the device is more convenient to use, and the stirring shaft and the stirring fan rod can conduct air injection during processing to promote stirring.