The utility model discloses a reaction kettle jacket cold and hot medium automatic switching control system, which specifically relates to the technical field of reaction kettle cold and hot medium switching, and comprises a reaction kettle body, wherein the reaction kettle body is provided with a control switching component, the control switching component comprises a central control component analyzer arranged on one side of the reaction kettle body, and the central control component analyzer is provided with a DCS control system. The utility model, by setting the control switching component, the compressed air inlet and outlet interface signal and the pneumatic valve belonging to the jacket cold and hot medium inlet and outlet pipeline form a regulating loop, and the temperature of the reaction kettle body is regulated and controlled, so as to facilitate the control of the device, facilitate the device to realize the switching process operation of the reaction kettle jacket cold and hot medium, and be convenient to use and have good practicability.