The invention relates to a fuel concentration radial layering combustor device. The fuel concentration radial layering combustor device comprises a combustor casing (7), a mixing gas ignition device (6), a mixing gas spray hole (8), and annular spray spouts (9), (10), (11) and (12), wherein the annular spout (9) is a second annular spout, the annular spout (10) is a third annular spout, the annular spout (11) is a fourth annular spout, and the annular spout (12) is a fifth annular spout; by designing the size of the structure, each annular cross section is the same in area; the interior of each annular spout is provided with a fuel inlet, an air inlet and a nitrogen inlet, the fuel inlet, the air inlet and the nitrogen inlet of each annular spout are mutually crossed and distributed, and a long enough mixing cavity is designed, so as to uniformly mix mixing gas; by controlling the opening degrees of valves of the fuel inlets, the air inlets and the nitrogen inlets (1), (2), (3), (4) and (5), the mixing gas of each annular spout has the same air combustion ratio, the same volume flow (namely the same flow rate) and different fuel volume concentrations, so as to realize the fuel concentration layering in the radial direction of the combustor.