Tail gas emission aftertreatment device of well field diesel engine

The utility model discloses a tail gas emission aftertreatment device of a well field diesel engine, which comprises a cyclone separator casing, an interior vent pipe, a corona electrode frame and corona electrode barbs, wherein the cyclone separator casing comprises a cylindrical casing arranged on the upper portion and a lower-portion conical barrel casing integrated with the cylindrical casing. The cylindrical casing is provided with an air inlet, one end of the interior vent pipe is communicated with an external vent barrel, the other end of the interior vent pipe extends into the corona electrode frame, the corona electrode frame is arranged in the cyclone separator casing and connected with an insulation terminal, and the corona electrode barbs are distributed on the wall and the outer wall of the corona electrode frame. The tail gas emission aftertreatment device can reduce particulate matter and nitrogen oxides in emitted tail gas of the diesel engine, and does not influence normal running of the dies