The utility model discloses a device for enhancing particle aggregation, which is arranged in a flue at the front end of a dust remover and comprises a Karman vortex street generating device and a fixing device, wherein the fixing device is arranged on the flue wall and is connected with the Karman vortex street generating device. Due to the generation of the Karman vortex street, the device enhances the particles in fluid to effectively aggregate, improves the effect of mixing and condensing the particles, effectively reduces the following discharging quantity of fine dust of the electric dust remover and has simple structure and low cost. The device can lead the following discharged quantity and concentration of the fine dust of the electric dust remover to be reduced by 30%-60%, the opacity to be reduced by 50%-80% and discharge of PM2.5 to be reduced by 70%-90%. The resistance of the gas for a single aggregator is not more than 200Pa. The device does not adopts a complex guide flow plate structure and has simple structure and low cost.