The utility model discloses a disinfecting and scrubbing device for air, which has advantages of better effects of disinfecting and scrubbing, long duration, extensive applicable scope and convenient usage. The utility model comprises a unit (10) for measuring raw materials which used to store sodium chlorite and hydrochloric acid and sent them into a mixer (13) according to measurement. The inlet of unit (20) for generating gas of chlorine oxide is communicated with the mixer (13) and the pipe (25) of its outlet is communicated with an extraction device. Compressed air is produced by air supply unit (30) and is continuously sent into the unit (20) for generating gas of chlorine oxide through the air aerator (24). An automatic emission unit (40) for residual liquid is connected with an outlet pipe (29) of unit (20) for generating gas of chlorine oxide for emission of waster liquid. A control unit (50) is used to control supply volume of sodium chlorite and hydrochloric acid in the unit (10) for measuring raw materials and to control status of emission of the automatic emission unit (40) for residual liquid.