Nasal breathing filter

The utility model relates to a nasal breathing filter, and belongs to human health protective devices. As is shown in the attached map, the nasal breathing filter comprises a filter body 1, catheters 2, nose plugs 3, a support 4 and an elastic cord 5. As is shown in the attached map, the filter body 1 is in a cystic shape, and one surface layer of the filter body 1 is replaceable filtering materials. The worn filter body can be placed behind the neck or in front of the chest of a wearer, and the two ends of the filter body are connected with the two soft catheters. The other ends of the two catheters are connected with the two cone-pipe-shaped nose plugs. The two nose plugs are connected through the support. The two ends of the support are connected with the elastic cord used for covering the position above the ears on the back of the head of the wearer to fix the two nose plugs. By means of the structure, when the wearer breathes, the air in the environment is absorbed into the cystic filter body, and the fi