Excellent smoke and fog elimination performance. Electrostatic air purification device can capture almost all fine dust and fog drops, with high defogging efficiency and long-term stability. In addition, the equipment wear is small, the design is reasonable, the manufacturing and installation are correct, the maintenance is timely, and the equipment can generally run efficiently for a long time. Low pressure loss and low energy consumption. The electrostatic air purifier uses coulomb force to collect dust, so the fan only bears the load of flue gas, so the airflow resistance is very small, about 100-300Pa. In addition, although the working voltage of the electrostatic air purifier itself is very high, the current is very small, so the electric power consumed by the electrostatic air purifier is very small. Wide application range. It is not only used in grinding machines, gear machining and large machining centers, but also suitable for other equipment that produces a lot of oil mist, dust, lampblack and emulsified aerosol during machining. When the index in flue gas changes in a certain range, the performance of electrostatic air purification device remains basically unchanged.