A venturi-type composite nozzle device for suctioning and removing air pollutants is disclosed. The venturi-type composite nozzle device suctions air pollutants in the vicinity thereof by using negative pressure formed through the venturi principle, and then mixes same with water, jets the mixed water and brings same into contact with the air pollutants again, so as to have a large adsorption ratio of air pollutants in comparison to the amount of water usage, and enables water to be reduced by that amount, and thus has excellent operating performance. To perform such functions, the device employs a venturi-type intake casing, an introducing-spray nozzle, and an impeller.