In order to reduce the negative effect of spent air from the air-jet generator and improve the acoustic agglomeration efficiency of aerosol particles,a new type air-jet generator with flow-sound-separation characteristics was designed. The new type air-jet generator can separate spent air from sound,reduce the negative effect. The effect of the side opening size on the air flow rate and sound pressure level at the exit of the horn was studied through experiments. When the side opening distance is about 6.5 mm,the exhaust effect is better,all of the spent air has been flow out of the side opening. The side opening distance remains the same,when the inlet pressure is 0.3MPa,the sound pressure level can reach 159.6 dB. The sound source was used to perform agglomeration experiments on fine droplet aerosol. The results show that the greater the inlet pressure of the sound source,the greater the sound pressure level. The force of sound field on aerosol and the probability of collisions between particles increase with increasing sound pressure level,finally the agglomeration speed becomes faster. The agglomeration efficiency is much better for high initial aerosol concentration,and the transmittance increases more rapidly at the early stage of acoustic agglomeration process. However,in the later stage of acoustic agglomeration process,the elimination effect is almost the same.