Multi-channel ternary catalytic air supplying device

The utility model provides a three-way catalytic air supplement device, and is characterized in that the utility model comprises a bypass system. The bypass system comprises two parallel connected bypasses. In the two parallel connected bypasses, a first bypass comprises serial connected activated burning promotion devices and a switch valve component, a second bypass comprises serial connected air supplement valve and the activated burning promotion device. The two parallel connected bypasses are respectively parallel connected between an air filter and an air inlet of a generator, and a bypass is formed for an air inlet pipeline through the air filter. The utility model can increase power of an engine and reduce the exhausted pollution. When the air supplement valve is failure, the utility model can still increase the power of the engine and avoid the exhausted pollution, and prolong service life of a catalytic converter. The utility model has simple structure, convenient use and adjustment, and is suitable for the car with a carburetor.