Abstract: An oily smoke purifying apparatus of central processing system type comprising an upright housing on the inside bottom of which is provided a water tank equipped with a water pump that is connected to a multitude of branch pipes capable of spraying a screen of water so that the space between these pipes and a slant catch plate located under the pipes forms a cooling chamber. As oily smoke is drawn into the cooling chamber by the fans located in the upper portion of the housing, oil and steam are separated; the oily mud dropping into the water tank and then being collected in the waste oil tank, the steam being exhausted via the upper portion of the housing after being multiply filtered.