Automatic temperature reduction device of brake hub

The utility model discloses an automatic temperature reduction device of a brake hub. The automatic temperature reduction device comprises a temperature sensor, a temperature control switch, a water tank and a water level sensor, wherein the temperature sensor is used for detecting the temperature of the brake hub, the temperature control switch is in data connection with the temperature sensor, the temperature control switch is connected with one end of a pipeline, and the other end of the pipeline and the brake hub are correspondingly arranged; the water tank is connected with the temperature control switch; the water level sensor is arranged in the water tank and is used for detecting the water level in the water tank. The automatic temperature reduction device of the brake hub is simple in structure, convenient to operate, capable of allowing an automobile to keep good rotation performance and capable of improving the safety coefficient.