The utility model relates to a closed foldable three-dimensional respirator, and the respirator has a certain shape and is a closed foldable three-dimensional respirator. The respirator mainly consists of an inner non-woven fabric, an outer non-woven fabric, and one filtering material layer. According to the needs, a lining layer can be added to achieve the supporting effect. A nasal splint is a built-in nasal splint, thereby guaranteeing the beauty of the respirator. In addition, the design of the respirator meets the demands of persons with different facial features, thereby guaranteeing that the respirator can meet different users in closeness. The respirator is mainly used for special and basic protection of a medical unit, can filter out particles and germs in the air, blocks spraying foams, blood, body fluid and secreta, and can be used for daily prevention against fog and haze.