The utility model relates to an invisible filtering nasal plug which comprises lower protective net bodies, surface net bodies, air filtering layers, supporting columns, a connecting part and vents. The invisible filtering nasal plug is characterized in that the surface net bodies cover air filtering layers in an umbrella-shaped mode. The lower protective net bodies are arranged below the surface net bodies. The vents are formed in the lower protective net bodies. The supporting columns facing upwards are arranged in the middle of the lower protective net bodies. The air filtering layers are arranged on the supporting columns. The surface net bodies are connected with the lower protective net bodies through the supporting columns. A nasal filter is composed of a lower protective net body, a surface net body, a supporting column and an air filtering layer on the supporting column. The right nasal filter and the left nasal filter are connected through the connecting part. The invisible filtering nasal plug has the advantages of being simple in structure, novel, unique, convenient to use, capable of preventing pollutants and bacteria in the air from going into the human body and comfortable in wearing as the surface net bodies are arranged outside the air filtering layers and scraps are not prone to fall.