Abstract: The submicron particle agglomeration by atomized charged droplets is an effective method of multi-field synergistic agglomeration of fine particles. Many scholars have carried out a lot of theoretical and experimental studies on the characteristic of fine particle removal through charged droplets. However,few studies have been conducted on the study of fine particle agglomeration of atomized charged droplets with particle size diameter of about 5 μm. In this paper,a double-layer dielectric barrier discharge electrode was designed to effectively block the development of the discharge arc in the traditional corona discharge gap and charge the atomized droplets by producing a uniform and stable high-density low-temperature plasma. Meanwhile,an experimental platform of submicron particle agglomeration through the atomized charged droplets was built for the experimental study of electrode stability and agglomeration characteristics of fine particles. Three aspects of electrode volt-ampere characteristics,the influence of load voltage on the agglomeration efficiency,and the influence of water mist quantity on the agglomeration efficiency were compared and characterized. The results show that the structure of the double-layer barrier medium is beneficial to improve the uniformity of the gap between charged electrodes,and the existence of atomized droplets is beneficial to promote the discharge in air gap space. Both the initiation voltage and unstable operating voltage of charged electrode decrease with the increase of the water mist flow. When the water mist flow is 102.9 mg/min,the voltage range for stable operation is17.2-41.1 kV. The atomized charged droplets have obvious effect on the agglomeration of fine particles. The agglomeration efficiency of 30-70 nm particles can reach up to 40% under the action of 45.0 kV. With the increase of atomization amount,the particle size distribution curve moves towards the increase of particle size as a whole,which also indicates that the increase of atomization amount is conducive to the removal of fine particles by charged atomization droplets. Under the condition of the same voltage,the particle agglomeration effect is significantly improved with the increase of the water mist flow.