The invention discloses a stirring reaction kettle and belongs to the field of fixed type reactors. The stirring reaction kettle mainly comprises a reaction kettle body, a stirring device in the reaction kettle body, a feed opening at the top of the reaction kettle body, and a discharge opening at the bottom end of the reaction kettle body; one or a plurality of drain pipes are arranged on the side wall of the reaction kettle body; one end of the drain pipe is positioned in the reaction kettle body, and a valve is mounted at the other end which passes through the side wall of the reaction kettle; and a liquid discharge pipeline is mounted behind the valve. According to the stirring reaction kettle provided by the invention, as soon as a reaction is finished, the obtained solid-liquid reactant can be separated instead of being separated by other special separating equipment, so that not only is quality ensured, but also the process is simplified, the equipment investment and the manufacturing cost are reduced, and the application range is wide.