Steel bar laying device and method for round section tunnel

The invention discloses a steel bar laying device and a steel bar laying method for a round-section tunnel, and relates to the technical field of tunnel construction. The laying device comprises a trolley body provided with a longitudinal walking guide rail and an annular walking guide rail; the ring rib forming machine is arranged at one end, directly facing the hole, of the trolley body and can automatically bend the reinforcing steel bars into an arc shape; the ring rib taking and conveying machine is arranged on the longitudinal walking guide rail and can take down the formed ring rib from the ring rib forming machine and convey the formed ring rib to a corresponding binding station; the two ends of the longitudinal bar taking and conveying machine are clamped on the corresponding annular walking guide rails in a sliding mode respectively, and the longitudinal bar taking and conveying machine can drive the longitudinal walking guide rails to automatically and circularly move along the annular walking guid