The utility model discloses a fresh air handling unit, comprising a compressor and an evaporator, and the evaporator is provided with an air supply outlet. An ultraviolet light catalysis device is arranged in front of the air supply outlet in the evaporator, an oxygen permeable membrane component is arranged above the ultraviolet light catalysis device and the air supply outlet, and the oxygen permeable membrane component is communicated with an air outlet pipe of the compressor; the ultraviolet light catalysis device is composed of an ultraviolet light tube, a photocatalyst and a light shielding enclosure, the ultraviolet light tube is arranged in the light shielding enclosure, and the photocatalyst is arranged in the light shielding enclosure; a plurality of air inlet windows are arranged on a windward surface of the light shielding enclosure, and a plurality of air outlet windows are arranged on a leeward surface thereof. The fresh air handling unit has the advantages of keeping constant temperature and humidity and providing fresh air of a common fresh air handling unit, and the functions of sterilization and improving the oxygen content in the air are additionally added, thereby effectively improving the indoor air quality, meeting the requirements of high-quality air of a user and expanding the application range of the fresh air handling unit.