The invention relates to a vehicle exhaust catalytic cleaner which comprises a three-way catalyst, a gasket and a vacuum interlayer shell. At least one of hydrogen storing alloys and gettering materials is contained in a vacuum interlayer, and the interlayer internally comprises one or more following distribution modes: powdery hydrogen storing alloys are is uniformly plated in the interlayer, powdery gettering material is uniformly plated in the interlayer, nubby hydrogen storing alloys are uniformly distributed in the interlayer, or nubby gettering materials are uniformly distributed in the interlayer. The interlayer of the catalytic cleaner is in a high vacuum state at room temperature or low temperature. The vehicle exhaust catalytic cleaner has the characteristics of high response speed, simple device structure and strong stability. The catalytic cleaner can be used for controlling the discharge of cold start contaminants of the vehicle exhaust and/or controlling the working temperature of the three-way catalyst of the vehicle exhaust, and can be used for prolonging the service life of the catalyst and the catalytic cleaner.