Reaction kettle and processing method thereof

The invention discloses a reaction kettle and a processing method thereof. The reaction kettle comprises a kettle body, wherein a heating device is arranged in the kettle body, a stirring shaft is rotationally arranged on the kettle body, a plurality of stirring paddles are arranged on the stirring shaft, a motor used for driving the stirring shaft is arranged on the kettle body, a polygonal accommodating cavity with an opening in the top is axially formed in the stirring shaft, a polygonal guide rod is arranged in the polygonal accommodating cavity in a penetrating mode, a first gear is arranged at the end, which extends out of the polygonal accommodating cavity, of the polygonal guide rod, the polygonal accommodating cavity is filled with a heat expansion and cold contraction medium, the polygonal guide rod stretches out and draws back along with the volume change of the heat expansion and cold contraction medium, the motor is connected with a gear set, the gear set comprises a plurality of adjusting gears