The invention aims at providing a method and a device for continuously purifying air in a vehicle. According to the method and the device, in-situ heating and regeneration of an adsorbent can be realized, so that the purpose of continuously purifying pollutants can be achieved. The method for continuously purifying air in the vehicle comprises the following steps: A: purifying air inside or outside the vehicle by utilizing an adsorbent, and discharging the purified air into the vehicle; and B: after the adsorbent adsorbs to be saturated, heating the adsorbent, and discharging the generated waste gas outside the vehicle. The device for continuously purifying air inside the vehicle and realizing the method comprises a shell provided with an air inlet and an air outlet, wherein the shell is internally provided with a purifying regeneration unit and a draught fan, the key point is that the air outlet consists of an air outlet inside the vehicle and an air outlet outside the vehicle, the air inlet, the air outlet inside the vehicle and the air outlet outside the vehicle can be opened and closed; the purifying regeneration unit consists of an adsorption module and a heating module for heating the adsorption module.