Oil stain cleaning device for outer opening of diesel engine

The utility model discloses a diesel engine outer opening oil stain cleaning device which comprises a diesel engine shell, an installation plate is installed at the top end of the diesel engine shell, a blocking table is installed at the top end of the installation plate, a breathing opening is formed in the installation plate, and flow slowing plates are installed on the two sides of the interior of the blocking table. According to the diesel engine oil pre-separation device, the flow slowing plate and the oil absorption paper are used for slowing down the upward flow rate of gas exhausted by a diesel engine, other diesel oil is absorbed by matching with the impact effect, and the pre-separation effect of the diesel oil in the gas is further improved under the action of the oil absorption net; and the oil-gas separation filter element is arranged so that diesel oil and air in gas can be separated, formation of oil-gas mixed pollutants can be reduced, condensation pollution of the oil-gas mixed pollutants can