The utility model provides a main level of firing adopts individual layer low pollution combustor of reverse whirl of radial two -stage of membrane in advance, wherein the pre -burning level is at the center, and the main level of firing is peripheral in the pre -burning level, the main level of firing is fixed with burner inner liner outer wall and burner inner liner inner wall through the whole end wall of head, and the level hookup is then fired through interstage duan yuzhu to the pre -burning level to it is concentric with the main level of firing, the main grade fuel oil transportation hole that fires of fuel entering of level is fired to the owner who comes from fuel nozzle, fire the oil spraying hole and spout to become owner of and fire level lamina membranacea internal channel in advance through the main level of firing, the part fuel forms the main grade straight oil spray that fires, the part fuel is got to the main level of firing and is formed even oil film in advance on the lamina membranacea, at the main level passageway outside the lamina membranacea in advance that fires, main fire the level in advance the lamina membranacea internal channel form outside, interior reverse whirl can brokenly atomize even oil film and form the main grade pneumatic nebulization oil mist that fires through shear effect, the main grade pneumatic nebulization oil mist that fires, the mixing further takes place with the air and forms more even oil -gas mixture for straight oil spray, even oil -gas mixture gets into the combustion zone to go on thoughtlessly burning in advance.