Air-air purifier capable of achieving staged purification

The utility model relates to the field of air-air purifiers, and provides an air-air purifier capable of achieving graded purification. The air-air purifier capable of achieving graded purification comprises a machine body, a shell is fixedly connected to the upper portion of the machine body, a draught fan is arranged in the shell and communicates with the interior of the machine body, an air inlet is formed in the side face of the shell, and an air outlet is formed in the side face of the shell. An air inlet is formed in the machine body, a dustproof net for blocking the air inlet is arranged at the air inlet, an HEPA filter layer is arranged in the machine body, an activated carbon adsorption layer is arranged below the HEPA filter layer, a UV sterilization area is arranged below the activated carbon adsorption layer, and an air outlet is formed in the side wall of the lower portion of the UV sterilization area. The multi-layer filtering design is adopted, and the more comprehensive and thorough air and ai