Self-evacuating diesel filter

The utility model relates to a self-evacuating diesel oil filter, which comprises an upper cover, a shell body and a filtering barrel. The position of the horizontal plane of an oil outlet nozzle 10 is arranged under the horizontal plane of an oil inlet nozzle 1, and an air chamber 13 is arranged between the two oil nozzles. One end of the oil outlet nozzle is communicated with a hollow cavity of a supporting seat 5 of the filtering barrel, and the other end is arranged on the outer wall of the upper cover 2. The plane above the oil outlet nozzle 1 is also provided with an oil return nozzle 6, and the inner part of the oil return nozzle is provided with a limiting screw 11. Because the oil outlet nozzle is arranged under the oil inlet nozzle, and the oil face of filtered diesel oil submerge the oil outlet nozzle, air mixed in oil only can emerge out of the oil face, and the air is exhausted by the oil return nozzle. Thus, the air and other impurities mixed in the oil can be thoroughly filtered, and oil supply quality can be ensured.