Precise air filter for filling main air compression pipeline

The utility model relates to the technical field of filters, in particular to an air precision filter for filling a main air compression pipeline. According to the technical scheme, the device comprises an air inlet pipe, a filter cartridge and an air outlet pipe, the air inlet pipe is installed at the position, close to the upper surface, of one side of the filter cartridge, a sealing plate is installed on the upper surface of the filter cartridge, a fixing ring is installed at the position, below the air inlet pipe, of the inner wall of the filter cartridge, a clamping groove is formed in the upper surface of the fixing ring, and an installation ring is installed in the clamping groove; a filter screen cylinder is installed on the lower surface of the installation ring, an air outlet pipe is installed on the side, away from the air inlet pipe, of the filter cylinder and located below the fixing ring, and a discharge outlet is formed in the axis position of the lower surface of the filter cylinder. Water and