The utility model discloses a burner, including casing, burning torch and central wind passageway, be equipped with central wind passageway in the casing, be equipped with the burning torch in the wind passageway of center, be equipped with air inlet on the casing, center wind path connection air inlet, the periphery of center wind passageway is equipped with at least one flue gas protection passageway, flue gas protection path connection flue gas entry, be equipped with the fuel rifle in the flue gas protection passageway, the fuel entry is connected to the fuel rifle. The utility model discloses a fuel media channel sets up in flue gas protection passageway, has reduced the fuel density when catching fire, has extended the interval that catches fire, has enlarged the sectional area of originated flame, has reduced the temperature of flame high -temperature region effectively to restrained nitrogen oxide's formation condition effectively, the burning is abundant, has reduced nitrogen oxide's formation. And simultaneously, the utility model discloses the head temperature resistant part of fuel rifle can improve life owing to there is the cooling protection of flue gas greatly.