Automobile exhaust particulate matter back flushing device

The utility model discloses an automobile exhaust particulate matter blowback device which comprises a diesel particulate filter (DPF), a pneumatic valve device, a blowback valve, a gas storage tank and a gas control device, the pneumatic valve device is arranged on a gas inlet end pipeline of the DPF, the blowback valve is arranged on a gas outlet end pipeline of the DPF, and the gas storage tank is arranged on the gas control device. Compressed air is connected with the air inlet end of the blowback valve through the air control device, and the pneumatic valve device and the blowback valve are connected with the first control output end and the second control output end of the air control device respectively. According to the utility model, high-pressure air is stored in the air storage tank, and after an automobile is used for a certain time, the DPF is reversely blown, so that most or all particulate matters or secondary particulate matters deposited in the DPF are automatically or manually discharged, an