The invention discloses a public storage cabinet with a self-cleaning function. The public storage cabinet comprises a cabinet body and a base. The cabinet body comprises a cabinet door, a cabinet box, a grid plate and an ultraviolet lamp. Exhaust holes are formed in the side wall of the cabinet box. A nano self-cleaning material layer is arranged on the outer wall of each of the cabinet door andthe cabinet box. The ultraviolet lamp and the grid plate are mounted on the inner wall of the cabinet box. The base is arranged at the bottom of the cabinet box. A through hole is formed in the side wall of the base. An inner thread is arranged on the inner side of the through hole. A ventilation tube is mounted on the base through the through hole. An outer thread matched with the ventilation tube is arranged on the outer portion of the ventilation tube. An activated-carbon filter screen and a screen are arranged in the ventilation tube. A blowing fan is mounted at the top of the cabinet box.The public storage cabinet has the advantages that through interaction among the blowing fan, the exhaust holes and the ventilation tube, air in the cabinet body is enabled to flow; through the screen, the activated-carbon filter screen, the ultraviolet lamp and the nano self-cleaning material layer, filtration and decomposition of floating dust and sterilization are realized, and self-cleaning of the storage cabinet is also achieved.