The invention discloses a forced dust removal device for an air filter of a passenger car, which comprises an air filter and an exhaust tail pipe connected with the engine supercharger of the passenger car. The forced dust removal device is characterized in that a dust extraction pipe is connected between the dust removal port of the air filter and the exhaust tail pipe, and a dust guide valve is arranged on the dust extraction pipe. The exhaust gas from the engine supercharger of the passenger car generates a certain vacuum degree at the site of the exhaust tail pipe, so that dust and other impurities from the air filter are sucked out under the action of vacuum and discharged outside the car together with the exhaust gas. The forced dust removal device can allow the dust to be removed from the air filter automatically instead of manually, and is applied to solve the problem that the efficiency of the air filter is reduced due to dust accumulation, so as to ensure real-time removal of dust and prolong the service life of the air filter.