The utility model discloses a reaction kettle with a mixed feeding device for a chemical reaction process. The reaction kettle comprises a kettle body, wherein through holes are formed in the bottom and the bottom of the kettle body, a circulating pipeline is connected between the two through holes, the circulating pipeline is provided with a circulating pump and a Venturi mixer, a material solution is contained in the kettle body, and an inlet for another material is arranged on the Venturi mixer. According to the reaction kettle disclosed by the utility model, during chemical reaction, the pressure inside the reaction kettle can not increased obviously, the temperature can not rise obviously either, and therefore, the reaction rate and capacity can be improved under the same reaction conditions.