The gas enters from the bottom inlet of the electric dust collector, and the dust particles and tar mist droplets in the gas are charged and moved directionally with the help of high-voltage static electricity to achieve the purpose of removing dust and tar. The gas is sent out through the upper outlet. There is a flushing device on the top of the equipment, which is turned on regularly to clean the dust accumulated on the corona electrode. There is a steam coil at the bottom of the equipment to prevent the tar from being easily flushed out due to condensation.