Abstract: Various flexible photovoltaic support forms including cable arrangement, beam arrangement, column arrangement and various support arrangements are classified and arranged, the flexible support structure layout is divided into cable-beam mode and cable-column mode. The economic rationality of the cable-beam mode, the cablecolumn mode and the combined arrangement is compared using the finite element model, and the span influence analysis is carried out. The results show that the cable-column model is economically superior to the cable-beam model; When it is arranged as a small span, only two main cables can be installed to meet the requirements of stress and deformation. When the span is large, a windproof system needs to be installed; The continuous multi-span layout has higher land utilization and better economy than single-span layout.