Truss structure is a kind of bending grid structure, which consists of straight bars connected at both ends. (Truss is a kind of plane structural unit formed by triangular element set composed of linear members. Trusses are mainly used for flexural members. Under the action of external load, the bending moment diagram and shear force diagram produced by simply supported truss are similar to those of simply supported beam. However, truss structures have completely different mechanical properties from simply supported beams. Under the vertical uniform load, the distribution of bending moment and shear force along the beam axis and the distribution of normal stress and shear stress on the section are extremely uneven. First of all, different uses and sizes of the stage require different truss product specifications, and iron trusses and aluminum alloy trusses can be selected according to different needs. Secondly, different construction methods of the stage will also affect the choice of truss. Secondly, design is also an essential step to build a stage. The design of truss needs to fully consider the use of stage decoration materials and the bearing capacity and stability of truss. No matter what kind of stage is built, we should adhere to the principle of safety first when designing truss style.