Convenient screen changing structure of oil engine

The utility model discloses a convenient screen changing structure of an oil engine, which comprises a fixed seat and a screen box, the fixed seat is arranged on the side wall of the upper part of a smoke collecting cavity of the oil engine, the screen box is detachably arranged on the fixed seat, the screen box is laid at the inlet of the smoke collecting cavity leading to an air duct, the screen box is in the shape of a latticed box with an opening at the top, and the top of the latticed box is provided with an air inlet. And a filter material can be placed in the net box. The fixing seat is arranged in the smoke collecting cavity of the oil engine, the net box is arranged on the fixing seat, and the replaceable filter material is placed in the net box, so that oil smoke can be adsorbed and prevented from being adhered to the oil engine, the oil net is prevented from being frequently disassembled and cleaned, the net box can be thoroughly cleaned after being disassembled when oil stains are serious, and the