The invention provides a Z-shaped steel beam-PC flier staircase. The Z-shaped steel beam-PC flier staircase comprises a pair of platforms arranged at an interval, a pair of Z-shaped steel beams obliquely fixed between the pair of platforms and a plurality of hollow fliers fixedly connected between the pair of Z-shaped steel beams, wherein every two adjacent hollow fliers are buckled together. Theoperation of the staircase is simple and easy to understand, the structure is simple, the manufacturing is convenient, materials and labor costs are saved, use is flexible, and current international energy conservation and emission reduction requirements are met.