Air compressor inlet gas purification device

The utility model discloses an air compressor inlet gas purification device which comprises a connecting pipe, a filter box, a precooler and a purifier, wherein the filter box, the precooler and the purifier are communicated together through the connecting pipe. The filter box is filled with an impurity removal material, and an air pump is arranged at an inlet; a circulating cooling pipe group is mounted in the precooler; the purifier comprises a tank body, a liquid collecting bin is arranged at the bottom in the tank body, and a regeneration purification bin filled with an unsaturated sodium hydroxide solution is arranged at the top in the tank body; a circulating pump is arranged on the liquid collecting bin, and a hose of the circulating pump is communicated with the regeneration purification bin; the regeneration purification bin is connected with a regeneration assembly, and a liquid distributor is arranged at the bottom. The filter box is matched with the purifier, impurities and water in ambient air ca