Overheating prevention type three-way catalyst

The utility model relates to the technical field of three-way catalytic converters, in particular to an overheating prevention type three-way catalytic converter which comprises a first box body and a metal sealing ring, a protection device is installed on the right side of the upper portion of the first box body, and a cooling device is installed on the left side of the protection device. When the three-way catalyst body is cooled, a water pump can be started to suck out water in the second pipeline, and then the water is discharged back into the second box body through the first pipeline to form circulation, so that uniform heat dissipation can be performed on the three-way catalyst body through cooperation of the circulating water and the heat conduction layer, and local high temperature of the three-way catalyst body is avoided; according to the three-way catalytic converter, the output shaft of the motor drives the fan blades to rotate, the fan blades can accelerate air flowing, the cooling efficiency of