The invention discloses a multistage spoke type rigid string tension structure. The structure comprises a rigid outer ring, a flexible cable inner ring system, an upper string rigid beam system and a lower string tension cable and rod system, wherein at least one flexible cable middle ring is arranged below the upper string rigid beam system, the flexible cable inner ring system is composed of an upper inner ring cable and a lower inner ring cable, and the upper string rigid beam system is composed of multiple rigid beams; the lower string tension cable and rod system comprises a plurality of multistage cables arranged below corresponding rigid beams, vertical support rods are arranged between the flexible cable middle rings and the rigid beams, and vertical support rods are arranged between each stage of cable and corresponding rigid beams. According to the structure, external loads are mainly resisted by axial force, stress efficiency is high, rigidity is high, and material consumption can be reduced; the rigid beams can bear local bending moment, so that a roof can be shaped into various curved surfaces, rigid roof panels can be adopted easily, and the structure can be widely applied to large public buildings including stadiums and football fields.