A venturi-type composite nozzle device for suctioning and removing air pollutants, of the present invention, 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. The device comprises: a venturi-type intake casing which includes an inlet part, an outlet part, and a throttling part, and which causes an internal pressure drop while water passes therethrough, thereby suctioning external air thereinto; an introducing-spray nozzle, which is provided at the inlet part of the intake casing and sprays water into the intake casing; and an impeller, which is provided at the outlet part of the intake casing, jets, to the outside of the outlet part, the water having passed through the intake casing, and applies centrifugal force to the water to expand a water-spraying radius.