Paddle automatic extension stirrer and reaction kettle

The embodiment of the utility model discloses a paddle automatic extension stirrer and a reaction kettle. The stirrer comprises a rotating shaft and extensible paddles arranged on the rotating shaft,wherein the rotating shaft is provided with a containing groove used for containing the stretchable paddle, the rotating shaft is provided with an automatic clamping tongue used for controlling the stretching state of the stretchable paddle, and when the rotating shaft rotates, the stretchable paddle can rotate along with the rotating shaft to be automatically unfolded, and the unfolding state isfixed through the automatic clamping tongue. The utility model discloses a reaction kettle with a paddle automatic extension stirrer. A manufacturer can control the extension of the blades of the stirrer as required; therefore, the effect of adjusting the stirring efficiency and the dispersing capacity of the reaction kettle is achieved; therefore, the reaction kettle disclosed by the utility model has the capability of fl